Frederick County, Maryland
Frederick County is a county in Maryland. Its county FIPS code is 24021. Use the boundary map and neighboring areas below to check the jurisdiction you need.
- Official code
- 24021
- Representative coordinates
- 39.470176, -77.397636
- County type
- County
- County seat or government
- Frederick
- Resident population, July 2025
- 302,883
- Land area
- 1,711.005 km²
- Water area
- 17.631 km²
- State
- Maryland
The representative point identifies this area. It is not a street address or a boundary survey.
Time zones in Frederick County
| Time zone | Local time and UTC offset | Next clock change |
|---|---|---|
| America/New_York | UTC-05:00 in January; UTC-04:00 in July. Enable JavaScript for the live clock. | Enable JavaScript for upcoming changes. |
Listed zones overlap the mapped area. A point lookup can distinguish sides of a boundary. Your device’s zone may differ.
Census ZIP areas
20842 · 20871 · 21701 · 21702 · 21703 · 21704 · 21705 · 21710 · 21714 · 21716 · 21717 · 21718 · 21719 · 21727 · 21754 · 21755 · 21757 · 21758 · 21762 · 21769 · 21770 · 21771 · 21773 · 21774 · 21776 · 21777 · 21778 · 21780 · 21783 · 21787 · 21788 · 21790 · 21791 · 21793 · 21798
These statistical areas overlap the boundary. They are not delivery assignments; confirm mailing details with USPS ZIP Code Lookup.
Official county information
Use the US government local-office directory ↗ to find the office responsible for your address. A county website has not been confidently matched here. A geographic lookup cannot determine eligibility, tax liability or a court obligation.
Cities, towns and communities
These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.
- Adamstown CDP, MD
- Ballenger Creek CDP, MD
- Bartonsville CDP, MD
- Braddock Heights CDP, MD
- Brunswick city, MD
- Buckeystown CDP, MD
- Burkittsville town, MD
- Emmitsburg town, MD
- Frederick city, MD
- Graceham CDP, MD
- Green Valley CDP, MD
- Jefferson CDP, MD
- Lewistown CDP, MD
- Libertytown CDP, MD
- Linganore CDP, MD
- Middletown town, MD
- Monrovia CDP, MD
- Mount Airy town, MD
- Myersville town, MD
- New Market town, MD
- Point of Rocks CDP, MD
- Rosemont village, MD
- Sabillasville CDP, MD
- Spring Ridge CDP, MD
- Thurmont town, MD
- Urbana CDP, MD
- Walkersville town, MD
- Woodsboro town, MD
Areas sharing the mapped boundary
These areas touch this mapped boundary.
Before using this answer on a form
Use a precise point for address-level questions. A device accuracy circle can cross a boundary; confirm tax, voting or jury details with the responsible office.
Find the county at your current point, check its ZIP area, or find its physical time zone.