Montgomery County, Maryland
Montgomery County is a county in Maryland. Its county FIPS code is 24031. Use the boundary map and neighboring areas below to check the jurisdiction you need.
- Official code
- 24031
- Representative coordinates
- 39.137381, -77.203063
- County type
- County
- County seat or government
- Rockville
- Resident population, July 2025
- 1,074,582
- Land area
- 1,277.231 km²
- Water area
- 35.633 km²
- State
- Maryland
The representative point identifies this area. It is not a street address or a boundary survey.
Time zones in Montgomery 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
20705 · 20707 · 20777 · 20812 · 20814 · 20815 · 20816 · 20817 · 20818 · 20832 · 20833 · 20837 · 20838 · 20839 · 20841 · 20842 · 20850 · 20851 · 20852 · 20853 · 20854 · 20855 · 20860 · 20861 · 20862 · 20866 · 20868 · 20871 · 20872 · 20874 · 20876 · 20877 · 20878 · 20879 · 20880 · 20882 · 20886 · 20889 · 20892 · 20894 · 20895 · 20896 · 20899 · 20901 · 20902 · 20903 · 20904 · 20905 · 20906 · 20910 · 20912 · 21771 · 21797
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.
- Ashton-Sandy Spring CDP, MD
- Aspen Hill CDP, MD
- Barnesville town, MD
- Bethesda CDP, Maryland
- Brookeville town, MD
- Brookmont CDP, MD
- Burnt Mills CDP, MD
- Burtonsville CDP, MD
- Cabin John CDP, MD
- Calverton CDP, MD
- Chevy Chase town, MD
- Chevy Chase CDP, MD
- Chevy Chase Section Five village, MD
- Chevy Chase Section Three village, MD
- Chevy Chase View town, MD
- Chevy Chase Village town, MD
- Clarksburg CDP, MD
- Cloverly CDP, MD
- Colesville CDP, MD
- Damascus CDP, MD
- Darnestown CDP, MD
- Derwood CDP, MD
- Fairland CDP, MD
- Flower Hill CDP, MD
- Forest Glen CDP, MD
- Four Corners CDP, MD
- Friendship Heights Village CDP, MD
- Gaithersburg city, MD
- Garrett Park town, MD
- Germantown CDP, MD
Browse all cities, towns and communities for Montgomery County
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.