Frederick County
Sign in to savecounty in Maryland, United States
Key facts
- Country
- United States
- State
- Maryland
- Founded
- June 10, 1748
- Founded by
- Daniel Dulany the Elder
- Named after
- Frederick Calvert, 6th Baron Baltimore
- County seat
- Frederick
- County executive
- Jessica Fitzwater
- County council
- Renee Knapp ( D ), Brad Young ( D ), Jerry Donald ( D ), Steven McKay ( R ), M. C. Keegan-Ayer ( D ), Kavonte Duckett ( D ), Mason Carter ( R )
- Total
- 667 sq mi (1,730 km )
- Land
- 660 sq mi (1,700 km )
- Water
- 7.2 sq mi (19 km )
- Estimate 2025
- 302,883
- Density
- 410/sq mi (160/km )
- Demonym
- Fredneck
- Time zone
- Eastern (EST)
- Summer dst
- EDT
- Zip codes
- 21701, 21702, 21703, 21704, 21705, 21709
- Area codes
- 301, 240
via Wikipedia infobox
Article
Frederick County is located in Maryland, United States. As of the 2020 U.S. census, the population was 271,717. The county seat is Frederick. The county is part of the Capital region of the state.
Like other outlying sections of the Washington metropolitan area, Frederick County has experienced a rapid population increase since the 1980s. It borders the southern border of Pennsylvania and the northeastern border of Virginia.