Kaskaskia township
- County:
- Fayette County
- County Seat:
- No
- Area (mi²):
- 34.302
- State:
- Illinois
Kaskaskia township is located in Fayette County, Illinois. Kaskaskia township has a 2026 population of 537. Kaskaskia township is currently declining at a rate of -0.19% annually and its population has decreased by -1.65% since the most recent census, which recorded a population of 546 in 2020.
The median household income in Kaskaskia township is $62,656 with a poverty rate of 17.78%. The median age in Kaskaskia township is 44.5 years: 42.7 years for males, and 52.3 years for females. For every 100 females there are 90.9 males.