
Newtonia
- County:
- Newton County
- County Seat:
- No
- Area (mi²):
- 0.326
- State:
- Missouri
Newtonia is a town located in Newton County, Missouri. Newtonia has a 2025 population of 214. Newtonia is currently growing at a rate of 0.47% annually and its population has increased by 2.39% since the most recent census, which recorded a population of 209 in 2020.
The average household income in Newtonia is $63,238 with a poverty rate of 9.52%. The median age in Newtonia is 51.1 years: 50.5 years for males, and 52.3 years for females.