Preston township
- County:
- Richland County
- County Seat:
- No
- Area (mi²):
- 40.733
- State:
- Illinois
Preston township is located in Richland County, Illinois. Preston township has a 2026 population of 1,173. Preston township is currently declining at a rate of -0.85% annually and its population has decreased by -2.17% since the most recent census, which recorded a population of 1,199 in 2020.
The median household income in Preston township is $53,941 with a poverty rate of 9.18%. The median age in Preston township is 44.8 years: 53.3 years for males, and 44.1 years for females. For every 100 females there are 110.9 males.