JEFFERSON COUNTY

'Jefferson County' is the name of 25 counties and one parish in the United States. The following are named for Thomas Jefferson, third President of the United States:

★ Jefferson County, Alabama

★ Jefferson County, Arkansas

★ Jefferson County, Colorado

★ Jefferson County, Florida

★ Jefferson County, Georgia

★ Jefferson County, Idaho

★ Jefferson County, Illinois

★ Jefferson County, Indiana

★ Jefferson County, Iowa

★ Jefferson County, Kentucky

★ Jefferson Parish, Louisiana

★ Jefferson County, Missouri

★ Jefferson County, Nebraska

★ Jefferson County, New York

★ Jefferson County, Ohio

★ Jefferson County, Oklahoma

★ Jefferson County, Pennsylvania

★ Jefferson County, Tennessee

★ Jefferson County, West Virginia

★ Jefferson County, Wisconsin
It is not certain whether the following were named for Thomas Jefferson:

★ Jefferson County, Kansas

★ Jefferson County, Mississippi

★ Jefferson County, Montana

★ Jefferson County, Washington
Specifically named for other sources:

★ Jefferson County, Oregon (named for Mount Jefferson on its western border; therefore 'indirectly' named for Thomas Jefferson, as the mountain was named for the President.)

★ Jefferson County, Texas (named for Jefferson, Texas, the municipality that preceded the county; therefore 'indirectly' named for Thomas Jefferson, as the municipality was named for the President.)
There is also a Jefferson Davis Parish, Louisiana and a Jefferson Davis County, Mississippi