Jefferson County Map
The County of Jefferson is located in the State of Kentucky. Find directions to Jefferson County, browse local businesses, landmarks, get current traffic estimates, road conditions, and more. According to the 2020 US Census the Jefferson County population is estimated at 767,452 people. The Jefferson County time zone is Eastern Daylight Time which is 5 hours behind Coordinated Universal Time (UTC).
Nearby counties include Clark County, Floyd County, Harrison County, Bullitt County, Hardin County, Oldham County, Shelby County, Spencer County.
Top cities include Louisville, Jeffersontown, St. Matthews, Shively, Lyndon