What is a county?

By the CountyFinder editorial deskData as of November 1, 20266 primary sources

Most forms that ask "what county do you live in?" assume every American lives in something called a county. Almost everyone does, but the name, the powers and even the existence of a county government vary a lot by state. This guide explains what counts as a county, the exceptions, and why it matters for the answer our lookup gives you.

What a county is

A county is a territorial division of a state. For the Census Bureau it is the "primary" division: every state is cut into counties or county equivalents with no gaps and no overlaps, which is why a county lookup can always return exactly one answer for a point on land ^[1]. Counties sit between the state and smaller units such as cities, towns, townships and school districts. A city can lie in one county or in several; a county almost always contains many cities, towns and rural areas.

The county you live in is defined by your address, not your city name or ZIP code. That difference is the reason this site exists: a city or ZIP code can cross a county line, but a single point cannot be in two counties.

How many counties there are, and what they are called

The 2024 TIGER/Line county file has 3,144 entries for the 50 states and DC. Each carries a legal/statistical area description (LSAD) code that says what kind of area it is ^[1]:

So 2,999 are plain counties and the other 145 are county equivalents. The Census Bureau treats all of them the same way for statistics, which is why our state pages list them side by side.

Parishes, boroughs and census areas

Louisiana calls its 64 county-level divisions parishes; the Census Bureau treats them exactly like counties ^[1]. Alaska is different again: much of the state is organized into boroughs, some of them consolidated city-boroughs, and the large unorganized remainder is split by the Census Bureau into census areas so that it can still publish county-level statistics. In the 2024 file Alaska has 30 county equivalents ^[1].

See the full lists on our Louisiana and Alaska pages.

Independent cities

An independent city is a city that is not part of any county; the Census Bureau treats it as a county equivalent. There are 40 in the 2024 file, and 38 of them are in Virginia ^[1]. The others are Baltimore city (Maryland) and St. Louis city (Missouri). If you live in one of these cities, the honest answer to "what county am I in?" is: none, your city is the county-level government.

Our lookup names the independent city in that case (for example "Richmond city, Virginia"), because that is the county-level area that contains you. Browse them on the Virginia page.

Connecticut's planning regions

Connecticut's eight historical counties stayed on Census maps for decades. The Census Bureau then finalised the state's nine Councils of Governments as the county-equivalent unit, listed in its January 2020 changes ^[2]; they appear as nine "planning regions" in current TIGER/Line files ^[1].

The practical effect: many websites and older datasets still say "Hartford County" or "Fairfield County", while current federal statistics, including ours, say "Capitol Planning Region" or "Western Connecticut Planning Region". Both describe real places; they are just different divisions. If a form asks for your Connecticut county, check which list it uses. Our Connecticut page lists the planning regions.

What counties actually do

What a county government does depends on state law. Common county jobs include running elections and voter registration, keeping property and court records, appraising and collecting property taxes, operating courts and jails, maintaining roads outside city limits, public health and emergency management. In Texas, for example, an appraisal district is established in each county to value property for taxes ^[3], and the county tax assessor-collector is the voter registrar unless the county has chosen another office ^[4].

In a few states, mainly in New England, counties have few or no government functions left. They still matter for statistics, maps and some courts, which is why the question "what county am I in?" still has an answer there.

Most and fewest counties by state

Texas has the most counties of any state, 254, followed by Georgia with 159. Delaware has the fewest, 3; Washington, DC is a single county equivalent ^[1]. Counties also vary hugely in size and population: in Texas alone, Harris County has about 4,758,579 residents and Kenedy County about 52 ^[5].

Every state is on our states page, with each county's seat, population, land area, density, home value and time zone.

Honest limits of county maps

The county lines in the Census TIGER/Line files, which our lookup uses, are published for statistical data collection and tabulation. The Census Bureau states that their depiction does not constitute a determination of jurisdictional authority or rights of ownership ^[6]. In practice they match official county lines very closely, but for a legal question (a deed, a tax bill, a court case) the county's own records decide. Our guide on confirming your county lists those records for Texas.

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