Jefferson County is the name of 25 counties and one parish in 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, Kansas
- Jefferson County, Kentucky
- Jefferson Parish, Louisiana
- 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
Famous quotes containing the words jefferson and/or county:
“[E]very thing is useful which contributes to fix us in the principles and practice of virtue.”
—Thomas Jefferson (1743–1826)
“Anti-Nebraska, Know-Nothings, and general disgust with the powers that be, have carried this county [Hamilton County, Ohio] by between seven and eight thousand majority! How people do hate Catholics, and what a happiness it was to show it in what seemed a lawful and patriotic manner.”
—Rutherford Birchard Hayes (1822–1893)