Otterville
- County:
- Greene County
- County Seat:
- No
- Area (mi²):
- 1.006
- State:
- Illinois
Otterville is a town located in Greene County, Illinois. Otterville has a 2026 population of 83. Otterville is currently declining at a rate of -1.19% annually and its population has decreased by -3.49% since the most recent census, which recorded a population of 86 in 2020.
The median household income in Otterville is $65,991 with a poverty rate of 12.8%. The median age in Otterville is 65.6 years: 67.5 years for males, and 65.4 years for females. For every 100 females there are 133.3 males.