Jefferson County

• Jeff Davis County (disambiguation)
• Jefferson County (The Waltons)
• 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, Jefferson Territory
• Jefferson County, Kansas
• Jefferson County, Kentucky
• Jefferson County, Mississippi
• Jefferson County, Missouri
• Jefferson County, Montana
• Jefferson County, Nebraska
• Jefferson County, New York
• Jefferson County, Ohio
• Jefferson County, Oklahoma
• Jefferson County, Oregon
• Jefferson County, Pennsylvania
• Jefferson County, Tennessee
• Jefferson County, Texas
• Jefferson County, Washington
• Jefferson County, West Virginia
• Jefferson County, Wisconsin
• Jefferson Davis County, Mississippi
• Jefferson Davis Parish, Louisiana
• Jefferson Parish, Louisiana