March 1 to June 1, 1860 - In these three months, 136 slaves were manumitted by their owners in Frederick County.   This was in advance of a new state law which took effect on June 1st, 1860, which prohibited the freeing of slaves.
[from John W. Ashbury's "History Moments"]

Maryland was first recognized as a "Free State" on November 1, 1864.   On that date, the Maryland Constitution of 1864 took effect.   By its provisions, slavery within the State's borders was abolished, and Maryland, indeed, became a free state.

Note - You can also Search on the given name, surname or "Slave, Slaves, negro, negroes, colored, coloured, mulatto" for more listings on the whole website (except those linked to other sites or in pdfs).

• FREDERICK COUNTY
  • Manumissions - 1748-1867
  • Land Records - 1752-1863
  • Wills - 1796-1854

  • Orphans Bound Out - 1800-1857

  • Montevue Hospital (Almshouse) Records - 1832-1930

  • Certificates of Freedom
    • 1815-1853
    • 1853-1863

  • African American Land Owners
    • 1825 Tax List
    • 1835 Tax List includes Frederick Town

  • Mortality Schedules (pdfs)
    • 1850 & 1860
    • 1870 & 1880

  • Slave Owners & Slaves - 1 Nov 1864
    (when Slavery was Abolished in MD*)
    
  
  

• CARROLL COUNTY
  • Land Owners - 1837 Tax List

  • Wills - 1837-1841

  • Slave Owners & Slaves - 1864* (pdf file at MSA)
    • Lists by Slave & by Owner (CCGS)
    • Individual Pages (Enoch Pratt Library)

  • Children Bound Out - 1837-1927

  • Marriages - Sam's Creek - 1874-1898
  
  

• HOWARD COUNTY
  • Manumissions, Indentures, Bills of Sale - 1851-1865

• MONTGOMERY COUNTY
  • Judgment & Land Records - 1814-1821

• WASHINGTON COUNTY
  • Judgment Records - 1782-1805
  • Wills - 1818-1820 (partial)
  • Certificates of Freedom
    • 1806-1834 (page down to pdf file)
    • 1834-1862 (page down to pdf file)

  • 1860 Census - African Americans

• ALLEGANY COUNTY
  • Slaves - 1792-1865

• WESTERN MARYLAND
  • Slave Owners - 1850 & 1860

• MARYLAND
  • Chancery Records - 1784-1848

• FREDERICK COUNTY
  • Frederick City
    • Montevue (Almshouse) Burials (pdf)
    • Laboring Sons Memorial Grounds

  • Catoctin Furnace - African American Cemetery

  • Libertytown
    • John Wesley Church Cemetery
    • Lawson Cemetery

  • OldField - Keys Chapel Cemetery
                        (from Death Certificates)

  • Edgewood - Mount Olive Cemetery
                        near New Windsor (from Death Certificates)

  • Tuscarora - Forest Grove Graveyard

  • Deaths & Burial Notices
    (From Page 1, Press Diagonal Arrows to view pdf)
    (Name, age, cemetery and newspaper/date only)
  
  

• CARROLL COUNTY
  • Westminster
    • Westminster Cemetery - BEAL - Fisher Family
    • St John's Catholic Cemetery
    • Ellsworth Cemetery
      • Photos
      • Video

  • Death Certificate Abstracts - 1898-1930
  
  
  
• MONTGOMERY COUNTY
  • Seneca - Government Quarry
    a/k/a Clipper Family Cemetery

  • Cabin John - Morningstar-Moses Cemetery
    • Endangered by Expansion
  
  
  
• WASHINGTON COUNTY
  • Hagerstown - Halfway African American Cemetery

  • Keedysville - Red Hill Cemetery

  • Coroner Inquisitions - 1853-1939

  • Civil War - US Colored Troups

  • Death Certificate Abstracts - 1898-1930
  
  
  
• BALTIMORE CITY & COUNTY
  • Baltimore City - Mount Auburn Cemetery
  
  
  
• MARYLAND
  • Lynchings
    • Map & List - 1854-1933
    • Biographies - 1854-1933 (MSA)

• Union Bridge - The Pilot

• Hagerstown Herald of Freedom

• Slaves & Free African Americans in Western MD - 1790-1864

• Harriet Tubman
  • Visitors Center
  • Nationl Historical Park
  • Underground Railroad
  • Underground Railroad Byway

• Maryland's Underground Railroad Network
• Hagerstown Underground Railroad
• Loudoun Co, VA to Frederick Co, MD Connection
• Underground Railroad in Delaware, Maryland & West Virginia
  by William J. Switala - 2004

• AFRIGENEAS

• Biographies of Maryland African Americans

• African Ironworking Culture in Western Maryland