Sefton township
- County:
- Fayette County
- County Seat:
- No
- Area (mi²):
- 49.88
- State:
- Illinois
Sefton township is located in Fayette County, Illinois. Sefton township has a 2026 population of 563. Sefton township is currently declining at a rate of -0.18% annually and its population has decreased by -0.88% since the most recent census, which recorded a population of 568 in 2020.
The median household income in Sefton township is $62,500 with a poverty rate of 1.19%. The median age in Sefton township is 49.7 years: 49.2 years for males, and 59.6 years for females. For every 100 females there are 133.3 males.