COUNTIES (by date of formation)

[photo, Courthouse, 41605 Courthouse Drive, Leonardtown, Maryland] Maryland's counties formed over the course of three centuries. St. Mary's County, the Western Shore's most southerly county, was the first to be organized, while Garrett County, which lies furthest to the west, was the last.

St. Mary's County Courthouse, 41605 Courthouse Drive, Leonardtown, Maryland, May 2009. Photo by Diane F. Evartt.

[photo, City Hall, 100 North Holliday St., Baltimore, Maryland]

Baltimore City was incorporated as a municipality within Baltimore County in 1796, and was established as a governmental unit separate from Baltimore County in 1851. Since the adoption of the Maryland Constitution of 1851, Baltimore City has been considered on a par with county jurisdictions.

City Hall, 100 North Holliday St., Baltimore, Maryland, June 2006. Photo by Diane F. Evartt.

1637 St. Mary's County
1642 Kent County
1650 Anne Arundel County
1654 Calvert County
1658 Charles County
1659/60 Baltimore County
1661/62 Talbot County
1666 Somerset County
1668/69 Dorchester County
1674 Cecil County
1695 Prince George's County
1706 Queen Anne's County
1742 Worcester County
1748 Frederick County
1773 Caroline County
1773 Harford County
1776 Montgomery County
1776 Washington County
1789 Allegany County
1796 Baltimore City
1837 Carroll County
1851 Howard County
1867 Wicomico County
1872 Garrett County

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