Where is Lafayette County?

5 Lafayette Counties in 5 states · 125,286 people (2025)

There are 5 counties named Lafayette County in the United States, in Arkansas, Florida, Mississippi, Missouri and Wisconsin. The most populous is Lafayette County, Mississippi (county seat: Oxford), with 59,597 people in 2025. 5 of them are named after Gilbert du Motier, Marquis de Lafayette, French general and politician (1757–1834).

Map of the United States showing where all 5 Lafayette Counties are, labeled by state
Every Lafayette County in the United States (red), labeled with its state. Boundaries: U.S. Census Bureau, 2025. Free to use with attribution (CC BY 4.0).

All 5 Lafayette Counties

Sorted by state. Each link opens the county's map.

StateCounty seatPopulation 2025Land area (sq mi)EstablishedNamed after
Lafayette County, ArkansasLewisville5,8885301827Gilbert du Motier, Marquis de Lafayette
Lafayette County, FloridaMayo8,7925431856Gilbert du Motier, Marquis de Lafayette
Lafayette County, MississippiOxford59,5976321836Gilbert du Motier, Marquis de Lafayette
Lafayette County, MissouriLexington33,531628–Gilbert du Motier, Marquis de Lafayette
Lafayette County, WisconsinDarlington17,4786341846Gilbert du Motier, Marquis de Lafayette

Questions about Lafayette Counties

How many Lafayette Counties are there?

There are 5 Lafayette Counties in the United States, in Arkansas, Florida, Mississippi, Missouri and Wisconsin.

Which Lafayette County is the largest?

By population, Lafayette County, Mississippi (59,597 people in 2025). By land area, Lafayette County, Wisconsin (634 sq mi).

Which Lafayette County is the oldest?

Lafayette County, Arkansas, established in 1827. The newest is Lafayette County, Florida (1856).

Why are there so many Lafayette Counties?

5 of the 5 are named after Gilbert du Motier, Marquis de Lafayette, French general and politician (1757–1834). Many counties took their names from the same founders, presidents and generals as new states were organized.

How do I find out which Lafayette County an address is in?

Open the county map of the state: it has a search box for cities, towns and ZIP codes. On a phone, the "what county am I in" tool on our sister site uses your location.

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Other common county names