
Sparta
- County:
- Randolph County
- County Seat:
- No
- Area (mi²):
- 11.156
- State:
- Illinois
Sparta is a city located in Randolph County, Illinois. Sparta has a 2025 population of 3,986. Sparta is currently declining at a rate of -0.47% annually and its population has decreased by -2.33% since the most recent census, which recorded a population of 4,081 in 2020.
The average household income in Sparta is $80,408 with a poverty rate of 18.97%. The median age in Sparta is 40.1 years: 38 years for males, and 43.4 years for females.