ZIP Code 21757
About Keymar
Keymar is an unincorporated community in Carroll County, Maryland, United States. The name of the community is a portmanteau of the family name Key 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.
From Wikipedia — text licensed CC BY-SA 4.0.
Area Profile
US Census (ACS 5-year · Gazetteer)
2,810
population
$98,520
median household income
80
people / sq mi
$414,300
median home value
$1,345
median gross rent
42.2
median age
1,129
housing units
1,068
households
35.2
land area (sq mi)