Harrisburg is a somewhat small city located in the state of Illinois. With a population of 7,937 people and three associated neighborhoods, Harrisburg is the 257th largest community in Illinois.

The citizens of Harrisburg are slightly less educated than the national average of 21.84% for the average city or town: 15.78% of adults in Harrisburg have a bachelor's degree or advanced degree

The per capita income in Harrisburg in 2022 was $27,259, which is low income relative to Illinois, and lower middle income relative to the rest of the US. This equates to an annual income of $109,036 for a family of four. However, Harrisburg contains both very wealthy and poor people as well.

The people who call Harrisburg home describe themselves as belonging to a variety of racial and ethnic groups. The greatest number of Harrisburg residents report their race to be White, followed by Black or African-American. Important ancestries of people in Harrisburg include Irish, English, German, Italian, and Scottish.

The most common language spoken in Harrisburg is English. Other important languages spoken here include Spanish and Langs. of India.