Ionia
- County:
- Benton County
- County Seat:
- No
- Area (mi²):
- 0.148
- State:
- Missouri
Ionia is a town located in Benton County, Missouri. Ionia has a 2026 population of 77. Ionia is currently declining at a rate of 0% annually and its population has increased by 5.48% since the most recent census, which recorded a population of 73 in 2020.
The median household income in Ionia is $16,875 with a poverty rate of 48.65%. The median age in Ionia is 57.6 years: 57.8 years for males, and 50.5 years for females. For every 100 females there are 184.6 males.