Form N-Q

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, DC 20549

FORM N-Q


QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANY

Investment Company Act file number         811-09475         

        Nuveen Insured Dividend Advantage Municipal Fund         
(Exact name of registrant as specified in charter)

Nuveen Investments
        333 West Wacker Drive, Chicago, Illinois 60606         
(Address of principal executive offices) (Zip code)


Jessica R. Droeger—Vice President and Secretary
        333 West Wacker Drive, Chicago, Illinois 60606         
(Name and address of agent for service)

Registrant's telephone number, including area code:         312-917-7700        

Date of fiscal year end:            10/31          

Date of reporting period:         1/31/07         

Form N-Q is to be used by management investment companies, other than small business investment companies registered on Form N-5 (§§ 239.24 and 274.5 of this chapter), to file reports with the Commission, not later than 60 days after the close of the first and third fiscal quarters, pursuant to rule 30b1-5 under the Investment Company Act of 1940 (17 CFR 270.30b1-5). The Commission may use the information provided on Form N-Q in its regulatory, disclosure review, inspection, and policymaking roles.

A registrant is required to disclose the information specified by Form N-Q, and the Commission will make this information public. A registrant is not required to respond to the collection of information contained in Form N-Q unless the Form displays a currently valid Office of Management and Budget (“OMB”) control number. Please direct comments concerning the accuracy of the information collection burden estimate and any suggestions for reducing the burden to the Secretary, Securities and Exchange Commission, 450 Fifth Street, NW, Washington, DC 20549-0609. The OMB has reviewed this collection of information under the clearance requirements of 44 U.S.C. § 3507.

Item 1. Schedule of Investments

    Portfolio of Investments (Unaudited)             
    Nuveen Insured Dividend Advantage Municipal Fund (NVG)             
    January 31, 2007             
Principal        Optional Call         
Amount (000)    Description (1)    Provisions (2)    Ratings (3)    Value 
    Alabama – 4.2% (2.7% of Total Investments)             
$          5,310    Athens, Alabama, Water and Sewerage Revenue Warrants, Series 2002, 5.300%, 5/01/32 – MBIA    5/12 at 101.00    AAA   $   5,646,123 
     Insured             
3,045    Hoover, Alabama, General Obligation Bonds, Series 2003, 5.000%, 3/01/20 – MBIA Insured    3/12 at 101.00    AAA    3,213,632 
10,000    Jefferson County, Alabama, Sewer Revenue Capital Improvement Warrants, Series 1999A, 5.375%,    2/09 at 101.00    AAA    10,400,200 
     2/01/36 (Pre-refunded 2/01/09) – FGIC Insured             
18,355    Total Alabama            19,259,955 
    Alaska – 3.5% (2.3% of Total Investments)             
15,000    Alaska, International Airport System Revenue Bonds, Series 2002B, 5.250%, 10/01/27    10/12 at 100.00    AAA    16,118,399 
     (Pre-refunded 10/01/12) – AMBAC Insured             
    Arizona – 1.1% (0.7% of Total Investments)             
5,000    Phoenix, Arizona, Civic Improvement Corporation, Senior Lien Airport Revenue Bonds, Series    7/12 at 100.00    AAA    5,207,550 
     2002B, 5.250%, 7/01/32 – FGIC Insured (Alternative Minimum Tax)             
    California – 17.6% (11.3% of Total Investments)             
2,000    Alameda Corridor Transportation Authority, California, Subordinate Lien Revenue Bonds, Series    No Opt. Call    AAA    1,113,700 
     2004A, 0.000%, 10/01/20 – AMBAC Insured             
    California Educational Facilities Authority, Revenue Bonds, Occidental College, Series 2005A:             
1,485     5.000%, 10/01/26 – MBIA Insured    10/15 at 100.00    Aaa    1,575,466 
1,565     5.000%, 10/01/27 – MBIA Insured    10/15 at 100.00    Aaa    1,659,166 
6,000    California Infrastructure Economic Development Bank, First Lien Revenue Bonds, San Francisco    1/28 at 100.00    AAA    6,712,740 
     Bay Area Toll Bridge, Series 2003A. 5.000%, 7/01/33 (Pre-refunded 1/01/28) – AMBAC Insured (UB)             
    California, General Obligation Bonds, Series 2000:             
375     5.250%, 9/01/17 (Pre-refunded 9/01/10) – MBIA Insured    9/10 at 100.00    AAA    395,385 
2,635     5.250%, 9/01/17 (Pre-refunded 9/01/10) – MBIA Insured    9/10 at 100.00    AAA    2,778,239 
190     5.250%, 9/01/17 (Pre-refunded 9/01/10) – MBIA Insured    9/10 at 100.00    AAA    200,655 
10,000    California, General Obligation Refunding Bonds, Series 2002, 5.000%, 2/01/23 – MBIA Insured    No Opt. Call    AAA    10,407,700 
8,890    California, General Obligation Veterans Welfare Bonds, Series 1997BH, 5.400%, 12/01/14    12/08 at 101.00    AA–    9,162,923 
     (Alternative Minimum Tax)             
3,000    California, General Obligation Veterans Welfare Bonds, Series 2001BZ, 5.375%, 12/01/24 – MBIA    6/07 at 101.00    AAA    3,031,020 
     Insured (Alternative Minimum Tax)             
2,425    Fullerton Public Financing Authority, California, Tax Allocation Revenue Bonds, Series 2005,    9/15 at 100.00    AAA    2,550,130 
     5.000%, 9/01/27 – AMBAC Insured             
1,990    Kern Community College District, California, General Obligation Bonds, Series 2006, 0.000%,    No Opt. Call    AAA    868,536 
     11/01/25 – FSA Insured             
625    Los Angeles Department of Water and Power, California, Waterworks Revenue Bonds, Series    7/16 at 100.00    AAA    664,288 
     2006A-1, 5.000%, 7/01/36 – AMBAC Insured             
7,935    Los Angeles, California, Certificates of Participation, Series 2002, 5.300%, 4/01/32 – AMBAC    4/12 at 100.00    AAA    8,359,126 
     Insured             
7,500    Northern California Power Agency, Revenue Refunding Bonds, Hydroelectric Project 1, Series    7/08 at 101.00    AAA    7,696,125 
     1998A, 5.200%, 7/01/32 – MBIA Insured             
2,320    Sacramento Municipal Utility District, California, Electric Revenue Bonds, Series 2001P,    8/11 at 100.00    AAA    2,457,506 
     5.250%, 8/15/18 – FSA Insured             
28,135    San Joaquin Hills Transportation Corridor Agency, Orange County, California, Toll Road Revenue    No Opt. Call    AAA    12,170,920 
     Refunding Bonds, Series 1997A, 0.000%, 1/15/26 – MBIA Insured (UB)             
6,720    San Jose Redevelopment Agency, California, Tax Allocation Bonds, Merged Area Redevelopment    8/17 at 100.00    AAA    6,402,883 
     Project, Series 2006C, 4.250%, 8/01/30 – MBIA Insured (UB)             
1,690    Ventura County Community College District, California, General Obligation Bonds, Series 2005B,    8/15 at 100.00    AAA    1,787,665 
     5.000%, 8/01/28 – MBIA Insured             
95,480    Total California            79,994,173 
    Colorado – 5.8% (3.7% of Total Investments)             
17,300    Adams County, Colorado, FHA-Insured Mortgage Revenue Bonds, Platte Valley Medical Center,    8/15 at 100.00    AAA    18,211,190 
     Series 2005, 5.000%, 8/01/24 – MBIA Insured             
750    Arkansas River Power Authority, Colorado, Power Revenue Bonds, Series 2006, 5.250%, 10/01/32 –    10/16 at 100.00    AAA    808,598 
     XLCA Insured             
17,000    E-470 Public Highway Authority, Colorado, Senior Revenue Bonds, Series 2000B, 0.000%,    No Opt. Call    AAA    7,462,320 
     9/01/25 – MBIA Insured             
35,050    Total Colorado            26,482,108 
    Florida – 12.8% (8.2% of Total Investments)             
    Florida Municipal Loan Council, Revenue Bonds, Series 2003B:             
2,305     5.250%, 12/01/17 – MBIA Insured    12/13 at 100.00    AAA    2,480,088 
1,480     5.250%, 12/01/18 – MBIA Insured    12/13 at 100.00    AAA    1,590,956 
11,600    Greater Orlando Aviation Authority, Florida, Airport Facilities Revenue Bonds, Series 2002B,    10/12 at 100.00    AAA    12,063,652 
     5.125%, 10/01/21 – FSA Insured (Alternative Minimum Tax)             
6,000    JEA, Florida, Water and Sewerage System Revenue Bonds, Series 2002A, 5.500%, 10/01/41 – MBIA    4/07 at 100.00    AAA    6,015,960 
     Insured             
8,155    Lee County, Florida, Solid Waste System Revenue Refunding Bonds, Series 2001, 5.625%,    10/11 at 100.00    Aaa    8,674,310 
     10/01/13 – MBIA Insured (Alternative Minimum Tax)             
    Miami-Dade County, Florida, Aviation Revenue Bonds, Miami International Airport, Series 2002:             
7,165     5.625%, 10/01/15 – FGIC Insured (Alternative Minimum Tax)    10/12 at 100.00    AAA    7,754,250 
5,600     5.750%, 10/01/16 – FGIC Insured (Alternative Minimum Tax)    10/12 at 100.00    AAA    6,070,008 
10,000     5.125%, 10/01/21 – FGIC Insured (Alternative Minimum Tax)    10/12 at 100.00    AAA    10,420,100 
2,000     5.250%, 10/01/22 – FGIC Insured (Alternative Minimum Tax)    10/12 at 100.00    AAA    2,096,580 
1,000    Tallahassee, Florida, Energy System Revenue Bonds, Series 2005, 5.000%, 10/01/28 – MBIA Insured    10/15 at 100.00    AAA    1,054,960 
55,305    Total Florida            58,220,864 
    Georgia – 2.2% (1.4% of Total Investments)             
6,925    Atlanta and Fulton County Recreation Authority, Georgia, Guaranteed Revenue Bonds, Park    12/15 at 100.00    AAA    7,316,886 
     Improvement, Series 2005A, 5.000%, 12/01/30 – MBIA Insured             
1,000    Atlanta, Georgia, Water and Wastewater Revenue Bonds, Series 2004, 5.000%, 11/01/22 – FSA    11/14 at 100.00    AAA    1,056,120 
     Insured             
1,695    Georgia Housing and Finance Authority, Single Family Mortgage Bonds, Series 2002B-2, 5.500%,    12/11 at 100.00    AAA    1,753,274 
     6/01/32 (Alternative Minimum Tax)             
9,620    Total Georgia            10,126,280 
    Idaho – 1.0% (0.6% of Total Investments)             
    Idaho Housing and Finance Association, Grant and Revenue Anticipation Bonds, Federal Highway             
    Trust Funds, Series 2006:             
3,000     5.000%, 7/15/23 – MBIA Insured    7/16 at 100.00    Aaa    3,203,760 
1,130     5.000%, 7/15/24 – MBIA Insured    7/16 at 100.00    Aaa    1,205,834 
4,130    Total Idaho            4,409,594 
    Illinois – 12.9% (8.3% of Total Investments)             
10,000    Bolingbrook, Illinois, General Obligation Bonds, Series 2002A, 5.375%, 1/01/38 (Pre-refunded    1/12 at 100.00    AAA    10,711,500 
     1/01/12) – FGIC Insured             
1,305    Chicago, Illinois, General Obligation Bonds, Series 2001A, 5.500%, 1/01/38 – MBIA Insured    1/11 at 101.00    AAA    1,385,466 
    Chicago, Illinois, General Obligation Bonds, Series 2001A:             
50     5.500%, 1/01/38 (Pre-refunded 1/01/11) – MBIA Insured    1/11 at 101.00    AAA    53,543 
3,645     5.500%, 1/01/38 (Pre-refunded 1/01/11) – MBIA Insured    1/11 at 101.00    AAA    3,903,285 
    Chicago, Illinois, Second Lien Passenger Facility Charge Revenue Bonds, O’Hare International             
    Airport, Series 2001C:             
4,250     5.500%, 1/01/16 – AMBAC Insured (Alternative Minimum Tax)    1/11 at 101.00    AAA    4,497,010 
4,485     5.500%, 1/01/17 – AMBAC Insured (Alternative Minimum Tax)    1/11 at 101.00    AAA    4,738,986 
4,730     5.500%, 1/01/18 – AMBAC Insured (Alternative Minimum Tax)    1/11 at 101.00    AAA    4,992,610 
2,930     5.500%, 1/01/19 – AMBAC Insured (Alternative Minimum Tax)    1/11 at 101.00    AAA    3,088,308 
3,600    Chicago, Illinois, Third Lien General Airport Revenue Bonds, O’Hare International Airport,    1/16 at 100.00    AAA    3,879,972 
     Series 2005A, 5.250%, 1/01/24 – MBIA Insured             
3,000    Chicago, Illinois, Third Lien General Airport Revenue Refunding Bonds, O’Hare International    1/12 at 100.00    AAA    3,213,450 
     Airport, Series 2002A, 5.750%, 1/01/17 – MBIA Insured (Alternative Minimum Tax)             
4,000    Cicero, Cook County, Illinois, General Obligation Corporate Purpose Bonds, Series 2002,    12/12 at 101.00    AAA    4,227,080 
     5.000%, 12/01/21 – MBIA Insured             
730    DuPage County Community School District 200, Wheaton, Illinois, General Obligation Bonds,    10/13 at 100.00    Aaa    779,815 
     Series 2003C, 5.250%, 10/01/22 – FSA Insured             
770    DuPage County Community School District 200, Wheaton, Illinois, General Obligation Bonds,    10/13 at 100.00    Aaa    835,874 
     Series 2003C, 5.250%, 10/01/22 (Pre-refunded 10/01/13) – FSA Insured             
4,000    Illinois Toll Highway Authority, State Toll Highway Authority Revenue Bonds, Series 2006,    7/16 at 100.00    AAA    4,238,640 
     5.000%, 1/01/26 – FSA Insured             
5,000    Illinois, General Obligation Bonds, Illinois FIRST Program, Series 2002, 5.250%, 4/01/23 – FSA    4/12 at 100.00    AAA    5,276,900 
     Insured             
2,700    University of Illinois, Certificates of Participation, Utility Infrastructure Projects, Series    8/11 at 100.00    AAA    2,836,728 
     2001A, 5.000%, 8/15/20 (Pre-refunded 8/15/11) – AMBAC Insured             
55,195    Total Illinois            58,659,167 
    Indiana – 15.6% (10.0% of Total Investments)             
3,380    Evansville, Indiana, Sewerage Works Revenue Refunding Bonds, Series 2003A, 5.000%, 7/01/20 –    7/13 at 100.00    AAA    3,568,536 
     AMBAC Insured             
    Indiana Bond Bank, Special Program Bonds, Hendricks County Redevelopment District, Series             
    2002D:             
2,500     5.375%, 4/01/23 – AMBAC Insured    4/12 at 100.00    AAA    2,645,725 
7,075     5.250%, 4/01/26 – AMBAC Insured    4/12 at 100.00    AAA    7,446,579 
7,000     5.250%, 4/01/30 – AMBAC Insured    4/12 at 100.00    AAA    7,367,640 
10,000    Indiana Health Facility Financing Authority, Hospital Revenue Bonds, Marion General Hospital,    7/12 at 100.00    AAA    10,456,800 
     Series 2002, 5.250%, 7/01/32 – AMBAC Insured             
25,000    Indianapolis Local Public Improvement Bond Bank, Indiana, Waterworks Project, Series 2002A,    7/12 at 100.00    AAA    26,764,998 
     5.250%, 7/01/33 (Pre-refunded 7/01/12) – MBIA Insured             
    Northern Wells Community School Building Corporation, Wells County, Indiana, First Mortgage             
    Bonds, Series 2001:             
420     5.250%, 1/15/19 – FGIC Insured    7/12 at 100.00    AAA    444,545 
430     5.250%, 7/15/19 – FGIC Insured    7/12 at 100.00    AAA    455,129 
1,675     5.400%, 7/15/23 – FGIC Insured    7/12 at 100.00    AAA    1,780,274 
6,960    Valparaiso Middle School Building Corporation, Indiana, First Mortgage Refunding Bonds, Series    1/13 at 100.00    AAA    7,280,438 
     2002, 5.000%, 7/15/24 – MBIA Insured             
2,490    Whitley County Middle School Building Corporation, Columbia City, Indiana, First Mortgage    7/13 at 100.00    AAA    2,634,022 
     Bonds, Series 2003, 5.000%, 1/15/18 – FSA Insured             
66,930    Total Indiana            70,844,686 
    Louisiana – 2.7% (1.7% of Total Investments)             
8,280    Louisiana State, Gasoline Tax Revenue Bonds, Series 2006, 4.500%, 5/01/41 – FGIC Insured (UB)    5/16 at 100.00    AAA    8,074,656 
780    Louisiana State, Gasoline Tax Revenue Bonds, Series 2006, 4.750%, 5/01/39 – FSA Insured (UB)    5/16 at 100.00    AAA    796,052 
3,085    New Orleans, Louisiana, General Obligation Refunding Bonds, Series 2002, 5.125%, 9/01/21 –    9/12 at 100.00    AAA    3,222,005 
     MBIA Insured             
12,145    Total Louisiana            12,092,713 
    Massachusetts – 1.2% (0.7% of Total Investments)             
2,630    Massachusetts College Building Authority, Project Revenue Bonds, Series 2006A, 5.000%,    5/16 at 100.00    AAA    2,782,487 
     5/01/31 – AMBAC Insured             
1,550    Massachusetts Water Resources Authority, General Revenue Bonds, Series 2005A, 5.250%,    8/17 at 100.00    AAA    1,698,769 
     8/01/26 – MBIA Insured             
800    Massachusetts Water Resources Authority, General Revenue Bonds, Series 2007, Residual Trust    2/17 at 100.00    Aaa    754,352 
     7039, 5.850%, 8/01/46 (WI/DD, Settling 2/01/07) – FSA Insured (IF)             
4,980    Total Massachusetts            5,235,608 
    Missouri – 2.4% (1.6% of Total Investments)             
1,600    St. Louis County Pattonville School District R3, Missouri, General Obligation Bonds, Series    3/14 at 100.00    AAA    1,726,352 
     2004, 5.250%, 3/01/19 – FSA Insured             
8,735    St. Louis, Missouri, Airport Revenue Bonds, Airport Development Program, Series 2001A, 5.250%,    7/11 at 100.00    AAA    9,254,383 
     7/01/31 (Pre-refunded 7/01/11) – MBIA Insured             
10,335    Total Missouri            10,980,735 
    Nebraska – 1.9% (1.2% of Total Investments)             
6,360    Lincoln, Nebraska, Electric System Revenue Bonds, Series 2005, 5.000%, 9/01/32    9/15 at 100.00    AA    6,678,827 
    Municipal Energy Agency of Nebraska, Power Supply System Revenue Bonds, Series 2003A:             
1,000     5.250%, 4/01/20 – FSA Insured    4/13 at 100.00    AAA    1,069,630 
1,000     5.250%, 4/01/21 – FSA Insured    4/13 at 100.00    AAA    1,065,410 
8,360    Total Nebraska            8,813,867 
    Nevada – 2.0% (1.3% of Total Investments)             
8,750    Truckee Meadows Water Authority, Nevada, Water Revenue Bonds, Series 2001A, 5.250%, 7/01/34    7/11 at 100.00    AAA    9,270,275 
     (Pre-refunded 7/01/11) – FSA Insured             
    New Jersey – 0.5% (0.3% of Total Investments)             
2,150    New Jersey Transportation Trust Fund Authority, Transportation System Bonds, Series 2006A,    No Opt. Call    AA–    2,386,608 
     5.250%, 12/15/20             
    New York – 4.9% (3.2% of Total Investments)             
1,120    Dormitory Authority of the State of New York, FHA-Insured Mortgage Revenue Bonds, Montefiore    2/15 at 100.00    AAA    1,181,522 
     Hospital, Series 2004, 5.000%, 8/01/23 – FGIC Insured             
3,660    Dormitory Authority of the State of New York, Revenue Bonds, Mental Health Services Facilities    2/15 at 100.00    AAA    3,866,900 
     Improvements, Series 2005B, 5.000%, 2/15/23 – AMBAC Insured             
3,130    Hudson Yards Infrastructure Corporation, New York, Revenue Bonds, Series 2006, 4.500%, 2/15/47 –     2/17 at 100.00    AAA    3,094,975 
     MBIA Insured (UB)             
2,400    Long Island Power Authority, New York, Electric System General Revenue Bonds, Series 2006F,    11/16 at 100.00    AAA    2,310,504 
     4.250%, 5/01/33 – MBIA Insured (UB)             
1,500    Metropolitan Transportation Authority, New York, Transportation Revenue Bonds, Series 2005B,    11/15 at 100.00    AAA    1,587,900 
     5.000%, 11/15/30 – AMBAC Insured             
10,000    Metropolitan Transportation Authority, New York, Transportation Revenue Refunding Bonds,    11/12 at 100.00    AAA    10,419,800 
     Series 2002A, 5.000%, 11/15/30 – FSA Insured             
21,810    Total New York            22,461,601 
    North Carolina – 0.6% (0.4% of Total Investments)             
2,435    North Carolina Medical Care Commission, FHA-Insured Mortgage Revenue Bonds, Betsy Johnson    10/13 at 100.00    AAA    2,612,877 
     Regional Hospital Project, Series 2003, 5.375%, 10/01/24 – FSA Insured             
    Oregon – 1.8% (1.2% of Total Investments)             
    Oregon, General Obligation Veterans Welfare Bonds, Series 82:             
5,560     5.375%, 12/01/31    12/11 at 100.00    AA–    5,727,467 
2,590     5.500%, 12/01/42    12/11 at 100.00    AA–    2,668,891 
8,150    Total Oregon            8,396,358 
    Pennsylvania – 4.5% (2.9% of Total Investments)             
4,500    Allegheny County, Pennsylvania, Airport Revenue Refunding Bonds, Pittsburgh International    No Opt. Call    AAA    4,879,035 
     Airport, Series 1997A, 5.750%, 1/01/13 – MBIA Insured (Alternative Minimum Tax)             
5,000    Pennsylvania Higher Educational Facilities Authority, Revenue Bonds, University of    7/08 at 100.00    AAA    5,129,500 
     Pennsylvania, Series 1998, 5.500%, 7/15/38 (Pre-refunded 7/15/08) – MBIA Insured             
4,125    Pennsylvania Public School Building Authority, Lease Revenue Bonds, School District of    12/16 at 100.00    AAA    4,090,886 
     Philadelphia, Series 2006B, 4.500%, 6/01/32 – FSA Insured (UB)             
1,050    Pennsylvania Turnpike Commission, Turnpike Revenue Bonds, Series 2006A, 5.000%, 12/01/26 –    6/16 at 100.00    AAA    1,116,339 
     AMBAC Insured             
2,000    Philadelphia Municipal Authority, Pennsylvania, Lease Revenue Bonds, Series 2003B, 5.250%,    11/13 at 100.00    AAA    2,130,820 
     11/15/18 – FSA Insured             
2,000    Reading School District, Berks County, Pennsylvania, General Obligation Bonds, Series 2005,    1/16 at 100.00    AAA    2,145,380 
     5.000%, 1/15/19 – FSA Insured             
1,000    State Public School Building Authority, Pennsylvania, Lease Revenue Bonds, Philadelphia School    6/13 at 100.00    AAA    1,068,970 
     District, Series 2003, 5.000%, 6/01/23 (Pre-refunded 6/01/13) – FSA Insured             
19,675    Total Pennsylvania            20,560,930 
    Puerto Rico – 0.3% (0.2% of Total Investments)             
1,225    Puerto Rico Municipal Finance Agency, Series 2005C, 5.250%, 8/01/21 – CIFG Insured    No Opt. Call    AAA    1,372,845 
    South Carolina – 1.5% (0.9% of Total Investments)             
1,950    Greenville County School District, South Carolina, Installment Purchase Revenue Bonds, Series    12/16 at 100.00    AAA    2,062,418 
     2006, 5.000%, 12/01/28 – FSA Insured             
    Greenville, South Carolina, Tax Increment Revenue Improvement Bonds, Series 2003:             
1,000     5.500%, 4/01/17 – MBIA Insured    4/13 at 100.00    AAA    1,087,920 
2,300     5.000%, 4/01/21 – MBIA Insured    4/13 at 100.00    AAA    2,428,984 
1,000    Scago Educational Facilities Corporation, South Carolina, Installment Purchase Revenue Bonds,    10/15 at 100.00    AAA    1,057,930 
     Spartanburg County School District 5, Series 2005, 5.000%, 4/01/21 – FSA Insured             
6,250    Total South Carolina            6,637,252 
    Tennessee – 9.3% (6.0% of Total Investments)             
    Memphis, Tennessee, Sanitary Sewerage System Revenue Bonds, Series 2004:             
1,495     5.000%, 10/01/19 – FSA Insured    10/14 at 100.00    AAA    1,590,560 
1,455     5.000%, 10/01/20 – FSA Insured    10/14 at 100.00    AAA    1,545,734 
1,955     5.000%, 10/01/21 – FSA Insured    10/14 at 100.00    AAA    2,074,275 
10,000    Memphis-Shelby County Sports Authority, Tennessee, Revenue Bonds, Memphis Arena, Series 2002A,    11/12 at 100.00    AAA    10,462,300 
     5.125%, 11/01/28 – AMBAC Insured             
10,000    Memphis-Shelby County Sports Authority, Tennessee, Revenue Bonds, Memphis Arena, Series 2002B,    11/12 at 100.00    AAA    10,462,300 
     5.125%, 11/01/29 – AMBAC Insured             
15,195    Tennessee State School Bond Authority, Higher Educational Facilities Second Program Bonds,    5/12 at 100.00    AAA    16,252,419 
     Series 2002A, 5.250%, 5/01/32 (Pre-refunded 5/01/12) – FSA Insured             
40,100    Total Tennessee            42,387,588 
    Texas – 27.4% (17.7% of Total Investments)             
3,500    Dallas-Ft. Worth International Airport, Texas, Joint Revenue Refunding and Improvement Bonds,    11/11 at 100.00    AAA    3,751,720 
     Series 2001A, 5.750%, 11/01/13 – FGIC Insured (Alternative Minimum Tax)             
10,000    Gainesville Hospital District, Texas, Limited Tax General Obligation Bonds, Series 2002,    8/11 at 100.00    Aaa    10,440,900 
     5.375%, 8/15/32 – MBIA Insured             
1,210    Galveston, Texas, General Obligation Bonds, Series 2001, 5.250%, 5/01/21 – AMBAC Insured    5/11 at 100.00    AAA    1,265,612 
2,435    Galveston, Texas, General Obligation Bonds, Series 2001, 5.250%, 5/01/21 (Pre-refunded    5/11 at 100.00    AAA    2,574,672 
     5/01/11) – AMBAC Insured             
    Harris County Health Facilities Development Corporation, Texas, Thermal Utility Revenue Bonds,             
    TECO Project, Series 2003:             
2,240     5.000%, 11/15/16 – MBIA Insured    11/13 at 100.00    AAA    2,355,293 
2,355     5.000%, 11/15/17 – MBIA Insured    11/13 at 100.00    AAA    2,470,536 
13,000    Houston Area Water Corporation, Texas, Contract Revenue Bonds, Northeast Water Purification    3/12 at 100.00    AAA    13,569,010 
     Plant, Series 2002, 5.125%, 3/01/32 – FGIC Insured             
2,500    Houston Higher Education Finance Corporation, Texas, Revenue Bonds, Rice University, Series    11/09 at 101.00    AAA    2,631,400 
     1999A, 5.375%, 11/15/29 (Pre-refunded 11/15/09)             
1,000    Houston, Texas, First Lien Combined Utility System Revenue Bonds, Series 2004A, 5.250%,    5/14 at 100.00    AAA    1,074,370 
     5/15/24 – FGIC Insured             
4,345    San Antonio, Texas, Water System Senior Lien Revenue Refunding Bonds, Series 2002, 5.500%,    5/12 at 100.00    AAA    4,666,791 
     5/15/17 – FSA Insured             
5,970    Texas Department of Housing and Community Affairs, Residential Mortgage Revenue Bonds, Series    7/11 at 100.00    AAA    6,133,936 
     2001A, 5.350%, 7/01/33 (Alternative Minimum Tax)             
8,635    Texas Department of Housing and Community Affairs, Single Family Mortgage Bonds, Series 2002B,    3/12 at 100.00    AAA    8,939,816 
     5.550%, 9/01/33 – MBIA Insured (Alternative Minimum Tax)             
    Texas Public Finance Authority, Revenue Bonds, Texas Southern University Financing System,             
    Series 2002:             
3,520     5.125%, 11/01/20 – MBIA Insured    5/12 at 100.00    Aaa    3,708,179 
3,520     5.125%, 11/01/21 – MBIA Insured    5/12 at 100.00    Aaa    3,708,179 
    Texas Student Housing Authority, Revenue Bonds, Austin Project, Senior Series 2001A:             
9,400     5.375%, 1/01/23 – MBIA Insured    1/12 at 102.00    Aaa    10,086,764 
11,665     5.500%, 1/01/33 – MBIA Insured    1/12 at 102.00    Aaa    12,597,967 
5,000    Texas Water Development Board, Senior Lien State Revolving Fund Revenue Bonds, Series 1999B,    1/10 at 100.00    AAA    5,188,050 
     5.250%, 7/15/17             
9,145    Texas, General Obligation Bonds, Veterans Housing Assistance Program Fund II, Series 2002A-1,    6/12 at 100.00    Aa1    9,554,605 
     5.250%, 12/01/22 (Alternative Minimum Tax)             
    Williamson County, Texas, General Obligation Bonds, Series 2002:             
3,500     5.200%, 2/15/21 (Pre-refunded 2/15/12) – FSA Insured    2/12 at 100.00    AAA    3,720,255 
3,000     5.250%, 2/15/22 (Pre-refunded 2/15/12) – FSA Insured    2/12 at 100.00    AAA    3,195,600 
7,340     5.250%, 2/15/23 (Pre-refunded 2/15/12) – FSA Insured    2/12 at 100.00    AAA    7,818,568 
5,000     5.250%, 2/15/25 (Pre-refunded 2/15/12) – FSA Insured    2/12 at 100.00    AAA    5,326,000 
118,280    Total Texas            124,778,223 
    Washington – 14.9% (9.6% of Total Investments)             
5,385    Energy Northwest, Washington Public Power, Nine Canyon Wind Project Revenue Bonds, Series    7/16 at 100.00    AAA    5,266,530 
     2006A, 4.500%, 7/01/30 – AMBAC Insured             
6,600    Energy Northwest, Washington, Electric Revenue Refunding Bonds, Columbia Generating Station –    7/12 at 100.00    AAA    7,023,588 
     Nuclear Project 2, Series 2002B, 5.350%, 7/01/18 – FSA Insured             
7,675    Energy Northwest, Washington, Electric Revenue Refunding Bonds, Nuclear Project 1, Series    7/12 at 100.00    AAA    8,232,359 
     2002A, 5.500%, 7/01/15 – MBIA Insured             
2,500    Port of Seattle, Washington, Revenue Refunding Bonds, Series 2002D, 5.750%, 11/01/15 – FGIC    11/12 at 100.00    AAA    2,717,900 
     Insured (Alternative Minimum Tax)             
2,200    Snohomish County School District 2, Everett, Washington, General Obligation Bonds, Series    12/13 at 100.00    AAA    2,334,464 
     2003B, 5.000%, 6/01/17 – FSA Insured             
3,255    Thurston and Pierce Counties School District, Washington, General Obligation Bonds, Yelm    6/13 at 100.00    Aaa    3,506,123 
     Community Schools, Series 2003, 5.250%, 12/01/16 – FSA Insured             
    Washington State Economic Development Finance Authority, Wastewater Revenue Bonds, LOTT             
    Project, Series 2002:             
2,000     5.500%, 6/01/17 – AMBAC Insured    6/12 at 100.00    Aaa    2,150,240 
4,325     5.125%, 6/01/22 – AMBAC Insured    6/12 at 100.00    Aaa    4,543,672 
10,000    Washington State Healthcare Facilities Authority, Revenue Bonds, Children’s Hospital and    10/11 at 100.00    Aaa    10,554,600 
     Regional Medical Center, Series 2001, 5.125%, 10/01/31 (Pre-refunded 10/01/11) – AMBAC Insured             
15,000    Washington State Healthcare Facilities Authority, Revenue Bonds, Harrison Memorial Hospital,    8/13 at 102.00    AAA    15,661,799 
     Series 1998, 5.000%, 8/15/28 – AMBAC Insured             
5,170    Whitman County School District 267, Pullman, Washington, General Obligation Bonds, Series    6/12 at 100.00    Aaa    5,422,141 
     2002, 5.000%, 12/01/20 – FSA Insured             
64,110    Total Washington            67,413,416 
    Wisconsin – 2.9% (1.9% of Total Investments)             
11,950    Wisconsin, Transportation Revenue Refunding Bonds, Series 2002-1, 5.125%, 7/01/18 – AMBAC    7/12 at 100.00    AAA    12,631,270 
     Insured             
$      700,770    Total Investments (cost $671,777,410) – 155.5%            707,354,942 
    Floating Rate Obligations (6.4)%            (29,025,000) 
    Other Assets Less Liabilities – 2.1%            9,519,230 
    Preferred Shares, at Liquidation Value – (51.2)%            (233,000,000) 
    Net Assets Applicable to Common Shares – 100%           $   454,849,172 

    At least 80% of the Fund’s net assets (including net assets attributable to Preferred shares) are 
    invested in municipal securities that are either covered by Original Issue Insurance, Secondary Market 
    Insurance or Portfolio Insurance which ensures the timely payment of principal and interest. Up to 
    20% of the Fund’s net assets (including net assets attributable to Preferred shares) may be invested in 
    municipal securities that are (i) either backed by an escrow or trust containing sufficient U.S. 
    Government or U.S. Government agency securities (also ensuring the timely payment of principal and 
    interest), or (ii) rated, at the time of investment, within the four highest grades (Baa or BBB or better 
    by Moody’s, S&P or Fitch) or unrated but judged to be of comparable quality by the Adviser. 
(1)    All percentages shown in the Portfolio of Investments are based on net assets applicable to Common 
    shares unless otherwise noted. 
(2)    Optional Call Provisions: Dates (month and year) and prices of the earliest optional call or redemption. 
    There may be other call provisions at varying prices at later dates. Certain mortgage-backed 
    securities may be subject to periodic principal paydowns. 
(3)    Ratings: Using the higher of Standard & Poor’s or Moody’s rating. Ratings below BBB by Standard & 
    Poor’s Group or Baa by Moody’s Investor Service, Inc. are considered to be below investment grade. 
WI/DD    Purchased on a when-issued or delayed delivery basis. 
(UB)    Underlying bond of an inverse floating rate trust reflected as a financing transaction pursuant to the 
    provisions of SFAS No. 140. 
(IF)    Inverse floating rate investment. 

Income Tax Information

The following information is presented on an income tax basis. Differences between amounts for financial statement and federal income tax purposes are primarily due to the treatment of paydown gains and losses, timing differences in recognizing taxable market discount, timing differences in recognizing certain gains and losses on investment transactions and the treatment of investments in inverse floating rate transactions subject to SFAS No.140.

At January 31, 2007, the cost of investments was $644,450,094.

Gross unrealized appreciation and gross unrealized depreciation of investments at January 31, 2007, were as follows:

Gross unrealized:     
  Appreciation    $36,238,977 
  Depreciation    (2,420,983) 
Net unrealized appreciation (depreciation) of investments    $33,817,994 

Item 2. Controls and Procedures.

  1. The registrant's principal executive and principal financial officers, or persons performing similar functions, have concluded that the registrant's disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940, as amended (the "1940 Act") (17 CFR 270.30a-3(c))) are effective, as of a date within 90 days of the filing date of this report that includes the disclosure required by this paragraph, based on their evaluation of the controls and procedures required by Rule 30a-3(b) under the 1940 Act (17 CFR 270.30a-3(b)) and Rule 13a-15(b) or 15d-15(b) under the Securities Exchange Act of 1934 (17 CFR 240.13a-15(b) or 240.15d-15(b)).
  2. There were no changes in the registrant's internal control over financial reporting (as defined in Rule 30a-3(d) under the 1940 Act (17 CFR 270.30a-3(d)) that occurred during the registrant's last fiscal quarter that have materially affected, or are reasonably likely to materially affect, the registrant's internal control over financial reporting.

Item 3. Exhibits.

File as exhibits as part of this Form a separate certification for each principal executive officer and principal financial officer of the registrant as required by Rule 30a-2(a) under the 1940 Act (17 CFR 270.30a-2(a)), exactly as set forth below: EX-99 CERT Attached hereto.


SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

(Registrant)         Nuveen Insured Dividend Advantage Municipal Fund        

By (Signature and Title)*          /s/ Jessica R. Droeger                     
                                                    Jessica R. Droeger
                                                    Vice President and Secretary

Date         March 30, 2007        

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

By (Signature and Title)*         /s/ Gifford R. Zimmerman                    
                                                   Gifford R. Zimmerman
                                                   Chief Administrative Officer (principal executive officer) 

Date         March 30, 2007        

By (Signature and Title)*         /s/ Stephen D. Foy                              
                                                   Stephen D. Foy
                                                   Vice President and Controller (principal financial officer) 

Date        March 30, 2007        

* Print the name and title of each signing officer under his or her signature.