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County
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Host
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Allegany County:
formed in 1789 from part of Washington County.
County seat: Cumberland. |
Available for Adoption
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Anne Arundel County:
formed in 1650 from unorganized territory.
County seat: Annapolis. Was named Providence County between 1654 and 1658. |
Available for Adoption
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Baltimore City:
founded in 1729. Detached in 1851 from Baltimore County.
Though an independent city rather than a county, the City of Baltimore is considered the equal of a county for
most purposes and is a county-equivalent. |
Available for Adoption
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Baltimore County:
formed in 1659 from unorganized territory.
County seat: Towson. |
Available for Adoption
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| Calvert County:
formed in 1654 as Patuxent County from unorganized territory. Renamed Calvert County in 1658. County seat: Prince
Frederick. |
Available for Adoption
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Caroline County: formed in 1773 from parts of Dorchester County and Queen Anne's County.
County seat: Denton. |
Available for Adoption
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| Carroll County:
formed in 1837 from parts of Baltimore County and Frederick County. County seat: Westminster. |
Available for Adoption
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Cecil County:
formed in 1672 from parts of Baltimore County and Kent County.
County seat: Elkton. |
Available for Adoption
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Charles County:
formed in 1658 from unorganized territory.
County seat: La Plata. |
Available for Adoption
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Dorchester County:
formed in 1668 from unorganized territory.
County seat: Cambridge. |
Available for Adoption
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Frederick County:
formed in 1748 from part of Prince George's County.
County seat: Frederick. |
Available for Adoption
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Garrett County:
formed in 1872 from part of Allegany County.
County seat: Oakland. |
Available for Adoption
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Harford County: formed in 1773 from part of Baltimore County.
County seat: Bel Air. |
Available for Adoption
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Howard County: formed in 1851 from parts of Anne Arundel County and Baltimore County.
County seat: Ellicott City. |
Available for Adoption
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Kent County:
formed in 1642 from unorganized territory.
County seat: Chestertown. |
Available for Adoption
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Montgomery County:
formed in 1776 from part of Frederick County.
County seat: Rockville. |
Available for Adoption
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Prince George's County: formed in 1696 from parts of Calvert County and Charles County.
County seat: Upper Marlboro. |
Available for Adoption
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Queen Anne's County:
formed in 1706 from part of Talbot County.
County seat: Centerville. |
Available for Adoption
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St. Mary's County:
formed in 1637 from unorganized territory.
County seat: Leonardtown.
Was named Potomac County between 1654 and 1658. |
Available for Adoption
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Somerset County:
formed in 1666 from unorganized territory.
County seat: Princess Anne. |
Available for Adoption
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Talbot County:
formed in 1662 from part of Kent County.
County seat: Easton. |
Available for Adoption
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Washington County:
formed in 1776 from part of Frederick County.
County seat: Hagerstown. |
Available for Adoption
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Wicomico County: formed
in 1867 from parts of Somerset County and Worcester County.
County seat: Salisbury. |
Available for Adoption
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Worcester County:
formed in 1742 from part of Somerset County.
County seat: Snow Hill. |
Available for Adoption
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Defunct counties:
Charles County: formed in 1650 from part of Saint Mary's County. Abolished in 1654. Referred to as Old Charles
County.
Durham County: formed in 1669 from part of Somerset County and nonorganized territory. Abolished in 1672 and incorporated
in Worcester County.
Worcester County: formed in 1672 from part of Durham County and nonorganized territory. Lost in 1685 when Delaware
Colony was established. |
