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: 09/01/2007 – 11/30/2007


Item 1 – Schedule of Investments

BlackRock Maryland Municipal Bond Trust
 
Schedule of Investments as of November 30, 2007 (Unaudited)   (in Thousands)
 
Face    
 
    Amount   Municipal Bonds   Value
Maryland - 136.4%
$
500   Annapolis, Maryland, Special Obligation Revenue Bonds (Park Place Project), Series A, 5.35% due 7/01/2034
$
466
 
2,870   Anne Arundel County, Maryland, EDR (Community College Project), 5.25% due 9/01/2028
2,949
 
2,000   Baltimore County, Maryland, Metropolitan District, GO, 67th Issue, 5% due 6/01/2022
2,090
 
2,000   Baltimore County, Maryland, Metropolitan District, GO, 68th Issue, 5% due 8/01/2028
2,068
 
1,000   Baltimore County, Maryland, Revenue Refunding Bonds (Oak Crest Village, Inc.),
 
 
    Series A, 5% due 1/01/2037
942
 
500   Baltimore, Maryland, Convention Center Hotel Revenue Bonds, Senior Series A, 5.25% due 9/01/2039 (c)
527
 
1,000   Baltimore, Maryland, Special Obligation Tax Bonds (Harborview Lot Number 2), 6.50% due 7/01/2031
1,037
 
3,500   Baltimore, Maryland, Wastewater Project Revenue Refunding Bonds, Series A, 5.20% due 7/01/2032 (b)
3,672
 
2,000   Baltimore, Maryland, Wastewater Project Revenue Refunding Bonds, Series A, 5.125% due 7/01/2042 (b)
2,071
 
1,000   Frederick County, Maryland, Special Obligation Tax Bonds (Urbana Community Development Authority),
 
 
    6.625% due 7/01/2025
1,014
 
500   Howard County, Maryland, Retirement Community Revenue Refunding Bonds (Columbia Vantage House
 
 
    Corporation), Series A, 5.25% due 4/01/2033
455
 
250   Maryland State Community Development Administration, Department of Housing and Community Development,
 
 
    Residential Revenue Bonds, AMT, Series H, 5.10% due 9/01/2037
248
 
1,000   Maryland State Community Development Administration, Department of Housing and Community Development,
 
 
    Residential Revenue Refunding Bonds, AMT, Series D, 4.85% due 9/01/2037
951
 
2,000   Maryland State Health and Higher Educational Facilities Authority Revenue Bonds (Baltimore Board of Child
 
 
    Care), 5.375% due 7/01/2032
2,043
 
1,990   Maryland State Health and Higher Educational Facilities Authority Revenue Bonds (Carroll County General
 
 
    Hospital), 6% due 7/01/2037
2,055
 
2,000   Maryland State Health and Higher Educational Facilities Authority Revenue Bonds (Loyola College),
 
 
    5% due 10/01/2039
2,007
 
2,000   Maryland State Health and Higher Educational Facilities Authority Revenue Bonds (Union Hospital of Cecil
 
 
    County), 5.625% due 7/01/2032
2,042
 
2,000   Maryland State Health and Higher Educational Facilities Authority Revenue Bonds (University of Maryland
 
 
    Medical System), 5.25% due 7/01/2011 (d)
2,134
 
2,000   Maryland State Health and Higher Educational Facilities Authority, Revenue Refunding Bonds (Johns Hopkins
 
 
    University), 5% due 7/01/2041
2,031
 
1,000   Maryland State Health and Higher Educational Facilities Authority, Revenue Refunding Bonds (Peninsula
 
        Regional Medical Center), 5% due 7/01/2036   997
Portfolio Abbreviations 
To simplify the listings of BlackRock  Maryland  Municipal Bond Trust's portfolio  holdings in the Schedule of Investments, we have abbreviated the names of many of the securities  according to the list below.
           
  AMT Alternative Minimum Tax (subject to)   GO General Obligation Bonds
  EDR Economic Development Revenue Bonds      

1


BlackRock Maryland Municipal Bond Trust      
Schedule of Investments as of November 30, 2007 (Unaudited) (in Thousands)  
    Face          
    Amount   Municipal Bonds   Value  
 
$
1,905   Maryland State Industrial Development Financing Authority, EDR (National Aquarium in Baltimore, Inc.),      
        Series B, 5.20% due 11/01/2026
$
1,951  
    1,000   Maryland State Industrial Development Financing Authority, EDR (Our Lady of Good Counsel School), Series A,      
        6% due 5/01/2035   1,013  
    2,000   Maryland State Transportation Authority, Parking Revenue Bonds (Baltimore/Washington International Airport),      
        AMT, Series B, 5.125% due 3/01/2024 (a)   2,041  
    500   Montgomery County, Maryland, Lease Revenue Bonds (Metrorail Garage Projects), 5% due 6/01/2023   521  
    1,435   Montgomery County, Maryland, Lease Revenue Bonds (Metrorail Garage Projects), 5% due 6/01/2024   1,495  
    1,500   Prince Georges County, Maryland, Special Obligation Bonds (National Harbor Project), 5.20% due 7/01/2034   1,408  
    1,000   Saint Mary's College of Maryland, Academic and Auxiliary Facilities Fees Revenue Bonds,      
        Sub-Series A, 5% due 9/01/2027 (a)   1,037  
    1,000   Saint Mary's College of Maryland, Academic and Auxiliary Facilities Fees Revenue Bonds,      
        Sub-Series A, 5% due 9/01/2032 (a)   1,030  
Puerto Rico - 11.9%   1,500   Children's Trust Fund Project of Puerto Rico, Tobacco Settlement Revenue Refunding Bonds,      
        5.50% due 5/15/2039   1,465  
    1,750   Puerto Rico Commonwealth Highway and Transportation Authority, Transportation Revenue Refunding Bonds,      
        Series D, 5.25% due 7/01/2012 (d)   1,896  
    350   Puerto Rico Public Buildings Authority, Government Facilities Revenue Refunding Bonds,      
        Series D, 5.375% due 7/01/2033   354  
        Total Municipal Bonds (Cost - $44,482) - 148.3%   46,010  
        Corporate Bonds      
Multi State - 7.4%   2,000   Charter Mac Equity Issuer Trust, 7.20% due 10/31/2052 (e)   2,279  
        Total Corporate Bonds (Cost - $2,000) - 7.4%   2,279  
        Total Investments (Cost - $46,482*) - 155.7%   48,289  
        Other Assets Less Liabilities - 2.4%   750  
        Preferred Shares, at Redemption Value - (58.1%)   (18,020 )
        Net Assets Applicable to Common Shares - 100.0% $ 31,019  

* The cost and unrealized appreciation (depreciation) of investments as of November 30, 2007, as computed for federal income tax purposes, were as follows:

       Aggregate cost  
$
46,382  
       Gross unrealized appreciation  
$
2,218  
       Gross unrealized depreciation  
(311 )
       Net unrealized appreciation  
$
1,907  
(a) AMBAC Insured.  
   
(b) FGIC Insured.  
   
(c) XL Capital Insured.  
   

2


BlackRock Maryland Municipal Bond Trust      
Schedule of Investments as of November 30, 2007 (Unaudited) (in Thousands)  

(d) Prerefunded.

(e) The security may be offered and sold to "qualified institutional buyers" under Rule 144A of the Securities Act of 1933.

• 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    
Dividend
Affiliate Activity    
Income
Merrill Lynch Institutional Tax-Exempt Fund
(200)
$ 2

 

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 and 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 16, 2008

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 16, 2008

By:      /s/ Neal J. Andrews  
  Neal J. Andrews,  
  Chief Financial Officer (principal financial officer) of
  BlackRock Maryland Municipal Bond Trust

Date: January 16, 2008