
Mason City township
- County:
- Mason County
- County Seat:
- No
- Area (mi²):
- 35.462
- State:
- Illinois
Mason City township is located in Mason County, Illinois. Mason City township has a 2025 population of 2,167. Mason City township is currently declining at a rate of -1.46% annually and its population has decreased by -6.96% since the most recent census, which recorded a population of 2,329 in 2020.
The average household income in Mason City township is $76,633 with a poverty rate of 15.08%. The median age in Mason City township is 52 years: 51.4 years for males, and 52.8 years for females.