County Map with Cities
Browse every US county on an interactive map. Click any county to see its name, state, FIPS code — and the cities mapped inside it.
Click any US county on the map to list its cities, towns and villages — largest first.
County boundaries: US Census cartographic boundaries via the us-atlas dataset. Cities: OpenStreetMap places via the Overpass API — coverage is best in well-mapped urban areas.
How to use this tool
Pan and zoom across all 3,143 US counties.
See its name, state, and FIPS code instantly.
One click fetches mapped cities inside the county boundary.
What people use this tool for
Pinpoint the county of an ancestor's hometown.
Compare counties and their towns side by side.
Visualize how states break down into counties.
How it's calculated
County boundaries come from US Census cartographic data (us-atlas). Clicking a county queries the Overpass API for OpenStreetMap place nodes inside its bounding box, filtered by a point-in-polygon test against the county geometry.
Related tools and resources
Frequently asked questions
How many counties are shown?
All 3,143 US counties and county-equivalents, including Alaska boroughs and Louisiana parishes.
What is a FIPS code?
A five-digit Federal Information Processing code uniquely identifying each county (2-digit state + 3-digit county).
Where do the cities come from?
OpenStreetMap place nodes inside the county boundary, fetched live via the Overpass API.
Why are some counties' cities sparse?
OpenStreetMap mapping density varies; rural counties may have fewer mapped places.
Can I search for a county by name?
The companion interactive county map has a name search; here, click directly on the map.
Are independent cities included?
Yes — Virginia's independent cities and similar county-equivalents are part of the 3,143.
How current are the boundaries?
They follow the US Census cartographic boundary vintage shipped with us-atlas.
Does clicking work on mobile?
Yes — tap a county to select it, then tap 'load cities'.