Jefferson is a somewhat small city located in the state of Wisconsin. With a population of 7,649 people and two associated neighborhoods, Jefferson is the 122nd largest community in Wisconsin.

The education level of Jefferson citizens is a little higher than the average for US cities and towns: 21.34% of adults in Jefferson have at least a bachelor's degree.

The per capita income in Jefferson in 2018 was $43,204, which is upper middle income relative to Wisconsin and the nation. This equates to an annual income of $172,816 for a family of four. However, Jefferson contains both very wealthy and poor people as well.

Jefferson is a somewhat ethnically-diverse city. The people who call Jefferson home describe themselves as belonging to a variety of racial and ethnic groups. The greatest number of Jefferson residents report their race to be White, followed by Black or African-American. Jefferson also has a sizeable Hispanic population (people of Hispanic origin can be of any race). People of Hispanic or Latino origin account for 14.27% of the city’s residents. Important ancestries of people in Jefferson include German, Irish, English, Norwegian, and Italian.

The most common language spoken in Jefferson is English. Other important languages spoken here include Spanish and Italian.