UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM N-Q

QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED
MANAGEMENT INVESTMENT COMPANY

Investment Company Act file number:__811-21051______

_______BlackRock Maryland Municipal Bond Trust_______
(Exact name of registrant as specified in charter)

100 Bellevue Parkway, Wilmington, DE    19809 



(Address of principal executive offices) 
 
(Zip code) 

Robert S. Kapito, President

BlackRock Maryland Municipal Bond Trust

_______40 East 52nd Street, New York, NY 10022_______
(Name and address of agent for service)

Registrant's telephone number, including area code:_888-825-2257__________________

Date of fiscal year end:___August 31, 2005

Date of reporting period:__May 31, 2005_________________________________


Item 1. Schedule of Investments.

The registrant’s unaudited schedule of investments as of the close of the reporting period pursuant to Rule 30b1-5 under the Investment Company Act of 1940 is as follows:


PORTFOLIO OF INVESTMENTS
MAY 31, 2005 (Unaudited)

BlackRock Maryland Municipal Bond Trust (BZM)


  Principal        
    Amount     Option Call    
Rating1   (000)   Description Provisions2   Value  

      LONG-TERM INVESTMENTS—153.8%      
        Maryland—121.9%      
NR   $500   Annapolis Spec. Oblig., Park Place Proj., Ser. A, 5.35%, 7/01/34 01/15 @ 101   $     509,135  
A3   2,870   Anne Arundel Cnty. Econ. Dev., Cmnty. Coll. Proj., 5.25%, 9/01/28 09/12 @ 102   3,098,710  
NR   1,000   Baltimore, Spec. Oblig. Rev., Harborview Lot No. 2 Proj., 6.50%, 7/01/31 07/13 @ 101   1,061,540  
        Baltimore Cnty., GO,      
AAA   2,000 3       Met. 67th Dist., 5.00%, 6/01/22 06/11 @ 101   2,150,220  
AAA   2,000         Met. 68th Dist., 5.00%, 8/01/28 08/12 @ 100   2,123,360  
        Baltimore Wstwtr. Proj., Ser. A, FGIC,      
AAA   2,000         5.125%, 7/01/42 07/12 @ 100   2,107,180  
AAA   3,500         5.20%, 7/01/32 07/12 @ 100   3,763,270  
Baa3   1,500   Econ. Dev. Corp., Student Hsg. Rev., Univ. of Maryland Proj.,      
              Ser. A, 5.75%, 10/01/33 10/13 @ 100   1,576,785  
NR4   1,000   Frederick Cnty., Urbana Cmnty. Dev. Auth. Proj., 6.625%, 7/01/25 07/07 @ 102   1,045,460  
        Hlth. & Higher Edl. Facs. Auth.,      
A   2,000         Brd. of Child Care Proj., 5.375%, 7/01/32 07/12 @ 100   2,150,140  
BBB+   1,990         Carroll Cnty. Gen. Hosp. Proj., 6.00%, 7/01/37 07/12 @ 100   2,141,678  
A-   750         Goucher Coll. Proj., 5.375%, 7/01/25 07/14 @ 100   815,333  
AA   2,000         Johns Hopkins Univ. Proj., Ser. B, 5.00%, 7/01/41 07/11 @ 100   2,079,540  
A   2,000         Loyola Coll. Issue Proj., 5.00%, 10/01/39 10/09 @ 101   2,063,980  
A3   2,000         Union Hosp. of Cecil Cnty. Proj., 5.625%, 7/01/32 07/12 @ 100   2,123,800  
A   2,000         Univ. of Maryland Med. Sys. Proj., 5.25%, 7/01/34 07/11 @ 100   2,078,920  
A+   1,905   Ind. Dev. Fin. Auth., Econ. Dev. Rev., Nat. Aquarium Baltimore Fac. Proj.,      
              Ser. B, 5.20%, 11/01/26 11/12 @ 100   2,027,663  
        Montgomery Cnty. Lease, Metrorail Garage Proj.,      
AA   500         5.00%, 6/01/23 06/12 @ 100   534,965  
AA   1,435         5.00%, 6/01/24 06/12 @ 100   1,532,623  
        St. Marys Coll., Academic & Auxil. Fees, Ser. A, AMBAC,      
AAA   1,000         5.00%, 9/01/27 09/12 @ 101   1,064,520  
AAA   1,000         5.00%, 9/01/32 09/12 @ 101   1,058,060  
AAA   2,000   Transp. Auth., Arpt. Pkg. Rev., Baltimore/Wash Intl. Arpt. Proj.,      
              Ser. B, 5.125%, 3/01/24, AMBAC 03/12 @ 101   2,105,780  

              39,212,662  

        Multi-State—7.1%      
Baa1   2,000 5 Charter Mac Equity Issuer Trust, Ser. B-2, 7.20%, 10/31/52 10/14 @ 100   2,284,980  

        Puerto Rico—24.8%      
BBB   2,000   Children’s Trust Fund, Tobacco Settlement Rev., 5.50%, 5/15/39 05/12 @ 100   2,014,660  
AAA   2,060   Elec. Pwr. Auth., Ser. HH, 5.25%, 7/01/29, FSA 07/10 @ 101   2,233,576  
A   2,000   Hwy. & Transp. Auth., Ser. D, 5.25%, 7/01/38 07/12 @ 100   2,123,580  
        Pub. Bldgs. Auth., Gov’t Facs., Ser. D,      
A-   1,100 6       5.375%, 7/01/12 N/A   1,235,608  
BBB   350         5.375%, 7/01/33 07/12 @ 100   377,387  

              7,984,811  

        Total Investments—153.8% (cost $45,796,5677)     $49,482,453  
        Other assets in excess of liabilities—2.2%     698,297  
        Preferred shares at redemption value, including dividends payable—(56.0)%     (18,006,167 )

        Net Assets Applicable to Common Shareholders—100%     $32,174,583  



1 Using the higher of S&P’s, Moody’s or Fitch’s rating.
2 Date (month/year) and price of the earliest optional call or redemption. There may be other call provisions at varying prices at later dates.
3 Securities, or a portion thereof, pledged as collateral with a value of $215,022 on 144 short U.S. Treasury Note futures contracts expiring Sept. 2005. The value of such contracts on May 31, 2005 was $16,310,250, with an unrealized loss of $173,947.
4 Security is deemed to be of investment grade quality by the investment advisor.
5 Security is not registered under the Securities Act of 1933. These securities may be resold in transactions in accordance with Rule 144A under that Act, to qualified institutional buyers. As of May 31, 2005, the Trust held 7.1% of it nets assets, with a current market value of $2,284,980, in securities restricted as to resale.
6 This bond is prefunded. U.S. government securities, held in escrow, are used to pay interest on this security, as well as retire the bond in full at the date indicated, typically at a premium to par.
7 Cost for Federal income purposes is $45,792,516. The net unrealized appreciation on a tax basis is $3,689,937 consisting of $3,689,937 gross unrealized appreciation and $0 gross unrealized depreciation.

KEY TO ABBREVIATIONS
       
AMBAC — American Municipal Bond Assurance Corporation FSA — Financial Security Assurance
FGIC — Financial Guaranty Insurance Company GO — General Obligation

1


Item 2. Controls and Procedures.

(a) The registrant's principal executive officer and principal financial officer have evaluated the registrant's disclosure controls and procedures within 90 days of this filing and have concluded that the registrant’s disclosure controls and procedures are effective, as of that date, in ensuring that information required to be disclosed by the registrant in this Form N-Q was recorded, processed, summarized, and reported timely.

(b) The registrant's principal executive officer and principal financial officer are aware of no changes in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting.

Item 3. Exhibits.

Separate certifications of the registrant’s principal executive and financial officers pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 are attached as EX-99.CERT.


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)___BlackRock Maryland Municipal Bond Trust___

By: __/s/ Henry Gabbay_____________________________________________
Name: Henry Gabbay
Title: Treasurer
Date: July 22, 2005

      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: __/s/ Robert S. Kapito_____________________________________________
Name: Robert S. Kapito
Title: Principal Executive Officer
Date: July 22, 2005

By: __/s/ Henry Gabbay_____________________________________________
Name: Henry Gabbay
Title: Principal Financial Officer
Date: July 22, 2005