Demographics
2020 census
As of the 2020 census, 8,419 people and 1,703 families were residing in the city. The median age was 32.6 years; 19.5% of residents were under 18 and 17.0% were 65 or older. For every 100 females, there were 89.1 males, and for every 100 females 18 and over, there were 84.5 males.
About 97.2% of residents lived in urban areas, while 2.8% lived in rural areas.
Of the 3,078 households in Jefferson City, 29.6% had children under 18 living in them, 36.0% were married-couple households, 21.7% were households with a male householder and no spouse or partner present, and 34.6% were households with a female householder and no spouse or partner present. About 33.4% of all households were made up of individuals, and 12.8% had someone living alone who was 65 or older.
! Race !! Number !! Percentage
|-
| White || 7,132 || 84.7%
|-
| Black or African American || 309 || 3.7%
|-
| American Indian and Alaska Native || 37 || 0.4%
|-
| Asian || 86 || 1.0%
|-
| Native Hawaiian and other Pacific Islander || 2 || 0.0%
|-
| Some other race || 388 || 4.6%
|-
| Two or more races || 465 || 5.5%
|-
| Hispanic or Latino (of any race) || 692 || 8.2%
|}
2000 census
As of the 2000 census
State
Jefferson City is represented in the Tennessee House of Representatives in the 17th and 11th districts by Representatives Andrew Farmer and Jeremy Faison, respectively, both Republican.
In the Tennessee State Senate, Jefferson City is represented by the 8th district by Republican Frank Niceley.
Federal
Jefferson City is represented in the United States House of Representatives by Republican Tim Burchett of the 2nd congressional district.
Education
Public schools
Public schools in Jefferson City are operated by the Jefferson County Department of Education. Elementary students attend Jefferson Elementary, middle school students attend Jefferson Middle, and high school students attend Jefferson County High School in neighboring Dandridge, along with other students in the Jefferson County Schools District.
Carson-Newman University
Carson-Newman University, a private Southern Baptist liberal arts university, is located in Jefferson City adjacent to its downtown district. It was founded in 1851, and has a student enrollment of over 2,500.
Notable people
- Dana X. Bible, college football coach at Texas A & M, Nebraska, and Texas
- Mark Dean, inventor and computer scientist
- Phil Garner, ex-Major League Baseball player and manager
- Jim Henry, minority leader in the Tennessee House of Representatives from 1981 to 1986
- Kenneth Massey, American statistician
- Robert Edward Lee Mountcastle, a member of the Republican National Committee
- Carolyn Peck, former women's basketball coach, currently a basketball analyst at ESPN
- Herbert S. Walters, U.S. senator
- Clyde Wright, ex-Major League Baseball pitcher