# Jefferson County

> English word · Proper noun

## Definitions
1. One of 67 counties in Alabama, United States. County seat: Birmingham.
2. One of 75 counties in Arkansas, United States. County seat: Pine Bluff.
3. One of 64 counties in Colorado, United States. County seat: Golden.
4. One of 67 counties in Florida, United States. County seat: Monticello.
5. One of 159 counties in Georgia, United States. County seat: Louisville.
6. One of 44 counties in Idaho, United States. County seat: Rigby.
7. One of 102 counties Illinois, United States. County seat: Mount Vernon.
8. One of 92 counties in Indiana, United States. County seat: Madison.
9. One of 99 counties in Iowa United States. County seat: Fairfield.
10. One of 105 counties in Kansas, United States. County seat: Oskaloosa.
11. One of 120 counties in Kentucky, United States. County seat: Louisville.
12. One of 82 counties in Mississippi, United States. County seat: Fayette.
13. One of 114 counties in Missouri, United States. County seat: Hillsboro.
14. One of 56 counties in Montana, United States. County seat: Boulder.
15. One of 93 counties in Nebraska, United States. County seat: Fairbury.
16. One of 62 counties in New York, United States. County seat: Watertown.
17. One of 88 counties in Ohio, United States. County seat: Steubenville.
18. One of 77 counties in Oklahoma, United States. County seat: Waurika.
19. One of 36 counties in Oregon, United States. County seat: Madras. Named after Mount Jefferson (Oregon).
20. One of 67 counties in Pennsylvania, United States. County seat: Brookville.
21. One of 95 counties in Tennessee, United States. County seat: Dandridge.
22. One of 254 counties in Texas, United States. County seat: Beaumont.
23. One of 39 counties in Washington, United States. County seat: Port Townsend.
24. One of 55 counties in West Virginia, United States. County seat: Charles Town.
25. One of 72 counties in Wisconsin, United States. County seat: Jefferson. Named after Jefferson County, New York.

## Etymology
Named after Thomas Jefferson, except where noted.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/jefferson-county