What County and City Is This Address In?
Find the county, the city or place, whether the address is inside an incorporated city's limits, the town or township, and the ZIP code. One address, or up to 1,000 at once from a list or CSV file. To see county lines on a map, use the County Lines Map.
Include the city and state, or the ZIP code. US addresses only.
A header row with a street address column and city, state and ZIP columns, or one full address column. Up to 1,000 rows. Only the address columns are sent.
What is sent where: each address you look up goes from your browser to our server, which sends it to the US Census Bureau's geocoder (geocoding.geo.census.gov) and returns the answer. For a CSV file only the address columns are sent. We don't log, store or cache the addresses or the results, and nothing is put in the page address. "Try another geocoder" also sends that one address to Geocodio. Privacy policy
| # | Address | Result | Matched address | County | City or place | Inside city limits? | Town or township | ZIP | Notes |
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Before You Rely on the Answer
- Boundaries lag annexations. Cities report their limits to the Census Boundary and Annexation Survey as they stood on January 1 each year, and those boundaries reach the geocoder one to two years later. A recent annexation can be missing. For taxes, permits, voting or anything else that depends on it, check with the city or county.
- A Census-designated place (CDP) is not a city. It is a named community drawn for statistics, with no city government: an address in one is not inside any city's limits.
- Towns and townships. In Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, Vermont, New York, New Jersey, Pennsylvania, Michigan, Wisconsin and Minnesota, the town or township (a county subdivision) is the local government, even outside any city, village or borough. The tool shows it.
- City-counties. In a consolidated city-county (Indianapolis, Louisville, Nashville, San Francisco and others) the city and county are one government; an independent city (Baltimore, St. Louis, the cities of Virginia) belongs to no county.
- The mailing city is often not the municipality. The city in an address is the post office's name. The tool flags it when the two differ.
- The point is estimated. Census places an address along its street's address range, not on the building. On a street that is itself a city boundary, the answer can be on the wrong side.
County, City Limits and ZIP for Any US Address
Type an address to see its county, the city, town, village or borough it is in (if any), whether it is inside that place's limits, the town or township where that is the local government, and its ZIP code. Census's matched address is shown too, so a wrong match is easy to spot.
For a list, paste up to 1,000 addresses or upload a CSV file. Each row gets the same answer, or the reason it could not be matched, and the whole table downloads as a CSV with your own columns kept in front. No account, no key, no sign-up.
Where the Answers Come From
Every answer comes from the US Census Bureau's Geocoder, a free public service. A list is sent as Census batch files of 25 addresses (Census accepts up to 10,000 per file), and the boundaries for each matched point are then looked up one by one, because Census's batch answer gives only the state and county. Census's current address ranges (benchmark Public_AR_Current) and its current boundaries (vintage Current_Current) are used.
Census reports each match as exact or not exact; a not-exact match is flagged in the notes with the address Census actually matched. ZIP codes come from Census's matched address and can differ from the one typed.
Frequently Asked Questions
How do I find what county an address is in?
Type the street address with its city and state, or its ZIP code, and press Look up. The tool asks the US Census Bureau's geocoder for the address and shows its county, its city or place, whether it is inside an incorporated city's limits, its town or township where that is the local government, and its ZIP code. For many addresses at once, paste them one per line or upload a CSV file.
How does it tell whether an address is inside city limits?
Census finds the point of the address and checks which of its boundaries contain it. If the point is inside an incorporated place (a city, town, village or borough with its own government) the answer is yes, with its name. If it is only inside a Census-designated place, or in no place at all, the answer is no. In New England, New York, New Jersey, Pennsylvania, Michigan, Wisconsin and Minnesota the town or township is shown too, because there it is the local government even outside a city.
Why does my address say one city but the tool says it is not inside that city?
The city in a mailing address is the post office's name for the area, not the municipality. Many addresses with a Las Vegas, Houston or Atlanta mailing address are outside those cities' limits, in unincorporated county land or in another town. The tool says so when the mailing city and the municipality differ.
What is a Census-designated place (CDP)?
A CDP is a named community that the Census Bureau draws for statistics, such as Paradise in Nevada or Arlington in Virginia. It has no city government, so an address in a CDP is not inside any city's limits: the county (or, in some states, the town or township) provides local government.
What about consolidated city-counties and independent cities?
In a consolidated city-county such as Indianapolis, Louisville, Nashville or San Francisco, the city and county share one government, and the tool says so. An independent city such as Baltimore or the cities of Virginia is not part of any county: Census treats the city itself as the county.
How current are the boundaries?
They are the Census Bureau's current boundaries. Cities report their limits to the Census Boundary and Annexation Survey as they stood on January 1 each year, and those boundaries reach the geocoder one to two years later, so a recent annexation can be missing. For a decision that depends on it, such as taxes, permits or voting, check with the city or county.
Can I look up a list of addresses?
Yes. Choose Many addresses, then paste up to 1,000 addresses, one per line, or upload a CSV file with a street address column and city, state and ZIP columns (or one full address column). The results appear in a table and can be downloaded as a CSV, with your original columns first.
What happens to addresses it cannot match?
They are listed as not matched, with the reason: Census found no match, found several equally good matches (add the ZIP code), or the row had no ZIP code and no city and state. For an address Census could not match you can press Try another geocoder, which asks Geocodio for that one address. That is limited to 10 per visit, and to 100 a day for everyone, so it never uses up the address lookups our other tools rely on.
Is my data stored?
No. Each address goes from your browser to our server, which sends it to the US Census Bureau's geocoder and returns the answer; for a CSV file only the address columns are sent. We don't log, store or cache the addresses or the results, and nothing you look up is put in the page address. If you press Try another geocoder, that one address also goes to Geocodio, and if Geocodio finds it, the coordinate is kept for 24 hours under a one-way hash of the address, never the address itself, as on our other address tools.
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