Jefferson County

There's more than one place called Jefferson County:

United States of America

 * Jefferson County (Alabama) - in the Metropolitan (Alabama) region of Alabama
 * Jefferson County (Arkansas)
 * Jefferson County (Colorado) - in the Front Range region of Colorado
 * Jefferson County (Florida)
 * Jefferson County (Georgia)
 * Jefferson County (Idaho)
 * Jefferson County (Illinois)
 * Jefferson County (Indiana)
 * Jefferson County (Iowa)
 * Jefferson County (Kansas)
 * Jefferson County (Kentucky)
 * Jefferson Parish (Louisiana)
 * Jefferson County (Mississippi)
 * Jefferson County (Missouri)
 * Jefferson County (Montana)
 * Jefferson County (Nebraska) - in Eastern Nebraska
 * Jefferson County (New York) - see Watertown (New York) and the Thousand Islands
 * Jefferson County (Ohio)
 * Jefferson County (Oklahoma)
 * Jefferson County (Oregon)
 * Jefferson County (Pennsylvania)
 * Jefferson County (Tennessee)
 * Jefferson County (Texas)
 * Jefferson County (Washington) - in the Olympic Peninsula region of Washington (state)
 * Jefferson County (West Virginia)
 * Jefferson County (Wisconsin)

See also:


 * Jefferson Davis Parish - in Louisiana
 * Jefferson Davis County - in Mississippi