Richwood township
- County:
- Jersey County
- County Seat:
- No
- Area (mi²):
- 37.558
- State:
- Illinois
Richwood township is located in Jersey County, Illinois. Richwood township has a 2026 population of 496. Richwood township is currently declining at a rate of -0.8% annually and its population has decreased by -4.8% since the most recent census, which recorded a population of 521 in 2020.
The median household income in Richwood township is $84,375 with a poverty rate of 12.59%. The median age in Richwood township is 54.3 years: 53.4 years for males, and 55.5 years for females. For every 100 females there are 74.3 males.