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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

Name of Fund: BlackRock Maryland Municipal Bond Trust (BZM)

Fund Address: 100 Bellevue Parkway, Wilmington, DE 19809

Name and address of agent for service: Donald C. Burke, Chief Executive Officer, BlackRock Maryland Municipal Bond Trust, 800 Scudders Mill Road, Plainsboro, NJ, 08536. Mailing address: P.O. Box 9011, Princeton, NJ, 08543-9011

Registrant’s telephone number, including area code: (800) 882-0052, Option 4

Date of fiscal year end: 08/31/2008

Date of reporting period: 09/01/2008 – 11/30/2008

 


Item 1 – Schedule of Investments


BlackRock Maryland Municipal Bond Trust    
Schedule of Investments November 30, 2008 (Unaudited)   (Percentages shown are based on Net Assets)
                                                      Par        
    Municipal Bonds        (000)                         Value   
Maryland - 117.9%   Annapolis, Maryland, Special Obligation Revenue Bonds (Park            
    Place Project), Series A, 5.35%, 7/01/34 $ 500   $ 333,280  
    Anne Arundel County, Maryland, EDR (Community College            
    Project), 5.25%, 9/01/28   1,870         1,659,307  
    Baltimore County, Maryland, Metropolitan District, GO, 67th            
    Issue, 5%, 6/01/22   2,000     2,024,280  
    Baltimore County, Maryland, Metropolitan District, GO, 68th            
    Issue, 5%, 8/01/28   2,000     1,922,360  
    Baltimore County, Maryland, Revenue Refunding Bonds (Oak            
    Crest Village, Inc.), Series A, 5%, 1/01/37   1,000     663,120  
    Baltimore, Maryland, Special Obligation Tax Bonds            
    (Harborview Lot Number 2), 6.50%, 7/01/31   1,000     797,140  
    Baltimore, Maryland, Wastewater Project Revenue Refunding            
    Bonds, Series A, 5.20%, 7/01/32 (a)(b)   3,500     3,231,690  
    Baltimore, Maryland, Wastewater Project Revenue Refunding            
    Bonds, Series A, 5.125%, 7/01/42 (a)(b)   2,000     1,781,880  
    Frederick County, Maryland, Special Obligation Tax Bonds (Urbana            
    Community Development Authority), 6.625%, 7/01/25   1,000     774,650  
    Howard County, Maryland, Retirement Community Revenue            
    Refunding Bonds (Columbia Vantage House Corporation),            
    Series A, 5.25%, 4/01/33   500     305,205  
    Maryland State Health and Higher Educational Facilities            
    Authority Revenue Bonds (Baltimore Board of Child Care),            
    5.375%, 7/01/32   2,000     1,771,960  
    Maryland State Health and Higher Educational Facilities            
    Authority Revenue Bonds (Carroll County General Hospital),            
    6%, 7/01/37   1,990     1,634,347  
    Maryland State Health and Higher Educational Facilities            
    Authority Revenue Bonds (Loyola College), 5%, 10/01/39   2,000     1,613,680  
    Maryland State Health and Higher Educational Facilities            
    Authority Revenue Bonds (Union Hospital of Cecil County),            
    5.625%, 7/01/32   2,000     1,711,060  
    Maryland State Health and Higher Educational Facilities            
    Authority Revenue Bonds (University of Maryland Medical            
    System), 5.25%, 7/01/11 (c)   2,000     2,142,360  
    Maryland State Health and Higher Educational Facilities            
    Authority, Revenue Refunding Bonds (Peninsula Regional            
    Medical Center), 5%, 7/01/36   1,000     771,970  
    Maryland State Industrial Development Financing Authority, EDR            
    (Our Lady of Good Counsel School), Series A, 6%, 5/01/35   1,000     699,140  

  Portfolio Abbreviations

To simplify the listings of portfolio holdings in the Schedule of Investments, the names and descriptions of many of the securities have been abbreviated according to the list below.

AMT        Alternative Minimum Tax (subject to)
EDR Economic Development Revenue Bonds
GO General Obligation Bonds

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BlackRock Maryland Municipal Bond Trust    
Schedule of Investments November 30, 2008 (Unaudited)   (Percentages shown are based on Net Assets)
                                                      Par        
    Municipal Bonds        (000)                         Value   
    Maryland State Transportation Authority, Parking Revenue            
    Bonds (Baltimore/Washington International Airport), AMT,            
    Series B, 5.125%, 3/01/24 (d) $ 2,000   $ 1,597,140  
    Montgomery County, Maryland, Lease Revenue Bonds            
    (Metrorail Garage Projects), 5%, 6/01/23   500     496,940  
    Montgomery County, Maryland, Lease Revenue Bonds            
    (Metrorail Garage Projects), 5%, 6/01/24   1,435     1,418,225  
    Prince Georges County, Maryland, Special Obligation Bonds            
    (National Harbor Project), 5.20%, 7/01/34   1,500     783,105  
              28,132,839  
Multi-State - 9.2%   Charter Mac Equity Issuer Trust, 7.20%, 10/31/52 (e)(f)   2,000     2,197,580  
Puerto Rico - 22.0%   Children's Trust Fund Project of Puerto Rico, Tobacco            
    Settlement Revenue Refunding Bonds, 5.50%, 5/15/39   1,500     1,062,600  
    Puerto Rico Commonwealth Highway and Transportation            
    Authority, Highway Revenue Refunding Bonds, Series CC,            
    5.25%, 7/01/36 (g)   2,595     2,283,366  
    Puerto Rico Commonwealth Highway and Transportation            
    Authority, Transportation Revenue Refunding Bonds, Series D,            
    5.25%, 7/01/12 (c)   1,500     1,625,235  
    Puerto Rico Public Buildings Authority, Government Facilities            
    Revenue Refunding Bonds, Series D, 5.375%, 7/01/33   350     272,850  
              5,244,051  
    Total Municipal Bonds - 149.1%         35,574,470  
    Municipal Bonds Transferred to            
    Tender Option Bond Trusts (h)            
Maryland - 11.6%   Maryland State Transportation Authority, Transportation Facilities            
    Projects Revenue Bonds, 5%, 7/01/41 (g)   3,000     2,769,390  
    Total Municipal Bonds Transferred to            
    Tender Option Bond Trusts - 11.6%         2,769,390  
    Total Long-Term Investments (Cost - $43,414,879) - 160.7%         38,343,860  
    Short-Term Securities   Shares        
    Merrill Lynch Institutional Tax-Exempt Fund, 1.08% (i)(j)   2,400,000     2,400,000  
    Total Short-Term Securities (Cost - $2,400,000) - 10.1%         2,400,000  
    Total Investments (Cost - $45,814,879*) - 170.8%         40,743,860  
    Other Assets Less Liabilities - 2.7%         648,941  
    Liability for Trust Certificates, Including Interest Expense and Fees            
    Payable - (6.4)%         (1,515,798 )
    Preferred Shares, at Redemption Value - (67.1)%            (16,007,007 )
    Net Assets Applicable to Common Shares - 100.0%         23,869,996  

*      The cost and unrealized appreciation (depreciation) of investments as of November 30, 2008, as computed for federal income tax purposes, were as follows:

         Aggregate cost   $ 44,237,893  
  Gross unrealized appreciation   $ 693,465  
  Gross unrealized depreciation     (5,687,498 )
  Net unrealized depreciation   $ (4,994,033 )

2



BlackRock Maryland Municipal Bond Trust
Schedule of Investments November 30, 2008 (Unaudited)

(a)     

MBIA Insured.

(b)

FGIC Insured.

(c)

U.S. government securities, held in escrow, are used to pay interest on this security as well as to retire the bond in full at the date indicated, typically at a premium to par.

(d)

AMBAC Insured.

(e)

Security exempt from registration under Rule 144A of the Securities Act of 1933. These securities may be resold in transactions exempt from registration to qualified institutional investors.

(f)

Security represents a beneficial interest in a trust. The collateral deposited into the trust is federally tax-exempt revenue bonds issued by various state or local governments, or their respective agencies or authorities. The security is subject to remarketing prior to its stated maturity, and is subject to mandatory redemption at maturity.

(g)

FSA Insured.

(h)

Securities represent bonds transferred to a tender option bond trust in exchange for which the Trust acquired residual interest certificates. These securities serve as collateral in a financing transaction.

(i)

Investments in companies considered to be an affiliate of the Trust, for purposes of Section 2(a)(3) of the Investment Company Act of 1940, were as follows:


    Net      
Affiliate   Activity     Income
Merrill Lynch Institutional Tax-Exempt Fund   296,574     $     14,506

(j)     

Represents the current yield as of report date.


  • Effective September 1, 2008, the Trust adopted Financial Accounting Standards Board Statement of Financial Accounting Standards No. 157, "Fair Value Measurements" ("FAS 157"). FAS 157 clarifies the definition of fair value, establishes a framework for measuring fair values and requires additional disclosures about the use of fair value measurements. Various inputs are used in determining the fair value of investments, which are follows:

  • Level 1 - price quotations in active markets/exchanges for identical securities

  • Level 2 - other observable inputs (including, but not limited to: quoted prices for similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the assets or liabilities (such as interest rates, yield curves, volatilities, prepayment speeds, loss severities, credit risks, and default rates) or other market-corroborated inputs)

  • Level 3 - unobservable inputs based on the best information available in the circumstance, to the extent observable inputs are not available (including the Trust's own assumption used in determining the fair value of investments)

The inputs or methodology used for valuing securities are not necessarily an indication of the risk associated with investing in those securities. For information about the Trust's policy regarding valuation of investments and other significant accounting policies, please refer to the Trust's most recent financial statements as contained in its annual report.

The following table summarizes the inputs used as of November 30, 2008 in determining the fair valuation of the Trust's investments:

Valuation     Investments in  
Inputs     Securities   
       Level 1   $ 2,400,000  
       Level 2     38,343,860  
       Level 3     -  
Total   $ 40,743,860  

3


Item 2 – Controls and Procedures
 
2(a) – 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”)) are effective as of a date within 90 days of the filing of this report based on the evaluation of these controls and procedures required by Rule 30a-3(b) under the 1940 Act and Rule 13a-15(b) under the Securities Exchange Act of 1934, as amended.
 
2(b) – There were no changes in the registrant’s internal control over financial reporting (as defined in Rule 30a-3(d) under the 1940 Act) 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
 
  Certifications – Attached hereto
 
  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.
 
  BlackRock Maryland Municipal Bond Trust
 
  By:
/s/ Donald C. Burke
    Donald C. Burke
    Chief Executive Officer of
    BlackRock Maryland Municipal Bond Trust
 
  Date: January 20, 2009
 
  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/ Donald C. Burke
    Donald C. Burke
    Chief Executive Officer (principal executive officer) of
    BlackRock Maryland Municipal Bond Trust
 
  Date: January 20, 2009
 
  By:
/s/ Neal J. Andrews
    Neal J. Andrews
    Chief Financial Officer (principal financial officer) of
    BlackRock Maryland Municipal Bond Trust
 
  Date: January 20, 2009