Illinois township
- County:
- Rush County
- County Seat:
- No
- Area (mi²):
- 48.02
- State:
- Kansas
Illinois township is located in Rush County, Kansas. Illinois township has a 2026 population of 47. Illinois township is currently declining at a rate of 0% annually and its population has decreased by -4.08% since the most recent census, which recorded a population of 49 in 2020.
The median age in Illinois township is 65.2 years: 0 years for males, and 0 years for females. For every 100 females there are 100.0 males.