About FindMyCounty

FindMyCounty.com is a free tool that helps you quickly identify what county any U.S. address or ZIP code belongs to. We use server-side geolocation to automatically detect your approximate county when you visit — no GPS permission or browser popups required.

Data Sources

Our county data comes from the U.S. Census Bureau (2020 ZCTA-County Relationship, 2024 Gazetteer) and USPS ZIP code databases. We cover all 50 states plus the District of Columbia, with over 42,000 ZIP codes mapped to more than 3,100 counties.

Interactive maps display county boundaries and ZIP code overlays using data derived from Census TIGER/Line shapefiles.

Privacy

We do not store your location data. County detection happens server-side using your IP address, and we do not track or log individual lookups. No cookies, no tracking scripts, no third-party analytics.