Carroll County, Maryland

Carroll County, Maryland
Carroll County Courthouse in Westminster
Location within the U.S. state of Maryland
Coordinates: 39°34′N 77°01′W / 39.57°N 77.02°W / 39.57; -77.02
Country United States
State Maryland
FoundedJanuary 19, 1837
Named afterCharles Carroll of Carrollton
SeatWestminster
Largest communityEldersburg
Area
 • Total
453 sq mi (1,170 km2)
 • Land448 sq mi (1,160 km2)
 • Water5.1 sq mi (13 km2)  1.1%
Population
 (2020)
 • Total
172,891
 • Estimate 
(2023)
176,639
 • Density386/sq mi (149/km2)
Time zoneUTC−5 (Eastern)
 • Summer (DST)UTC−4 (EDT)
Congressional districts2nd, 3rd
Websitecarrollcountymd.gov

Carroll County is a county located in the U.S. state of Maryland. As of the 2020 United States census, the population was 172,891. Its county seat is Westminster. The county is part of the Central Maryland region of the state. Carroll County is included in the Washington-Baltimore-Arlington, DC-MD-VA-WV-PA Combined Statistical Area. While predominantly rural, southern areas of the county have become increasingly suburban in recent years.