Keymar is an unincorporated community in Carroll County, Maryland, United States. The name of the community is a portmanteau of the family name ''Key'' (of which

Francis Scott Key Francis Scott Key (August 1, 1779January 11, 1843) was an American lawyer, author, and amateur poet from Frederick, Maryland, who wrote the lyrics for the American national anthem "The Star-Spangled Banner". Key observed the British bombardment ...

was a member) and ''Mar'' for Maryland. In 1822, Francis Scott Key sold his father's mansion and estate on Pipe Creek near this community. ''Keymar'' was likely the name of that estate.

References

Unincorporated communities in Carroll County, Maryland Unincorporated communities in Maryland {{CarrollCountyMD-geo-stub