![[photo, Harford County Courthouse, 20 West Courtland St., Bel Air, Maryland]](/msa/mdmanual/36loc/ha/images/1198-1-1024.jpg)
Maryland's counties formed over the course of three centuries. St. Mary's County, the Western Shore's most southerly county, in 1637 was the first to be organized, while Garrett County, which lies furthest to the west, in 1872 was the last.
Harford County Courthouse, 20 West Courtland St., Bel Air, Maryland, March 2005. Photo by Diane F. Evartt.
![[photo, City Hall, 100 North Holliday St., Baltimore, Maryland]](/msa/mdmanual/36loc/bcity/images/1198-1-1376.jpg)
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, but as a separate entity from Baltimore County.
City Hall, 100 North Holliday St., Baltimore, Maryland, June 2006. Photo by Diane F. Evartt.
![[photo, Courthouse, 41605 Courthouse Drive, Leonardtown, Maryland]](/msa/mdmanual/36loc/sm/images/1198-1-3966.jpg)
1637 St. Mary's County
St. Mary's County Courthouse, 41605 Courthouse Drive, Leonardtown, Maryland, May 2009. Photo by Diane F. Evartt.
![[photo, Worcester County Courthouse, One West Market St., Snow Hill, Maryland]](/msa/mdmanual/36loc/wo/jud/images/buildings/1198-1-08939b.jpg)
1706 Queen Anne's County
Worcester County Courthouse, One West Market St., Snow Hill, Maryland, June 2018. Photo by Diane F. Evartt.
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