Topeka
- County:
- Mason County
- County Seat:
- No
- Area (mi²):
- 0.137
- State:
- Illinois
Topeka is a village located in Mason County, Illinois. Topeka has a 2026 population of 56. Topeka is currently declining at a rate of 0% annually and its population has decreased by -3.45% since the most recent census, which recorded a population of 58 in 2020.
The median household income in Topeka is $77,500 with a poverty rate of 0%. The median age in Topeka is 45.9 years: 38.5 years for males, and 54.5 years for females. For every 100 females there are 147.4 males.