
New Madison
- County:
- Darke County
- County Seat:
- No
- Area (mi²):
- 0.474
- State:
- Ohio
New Madison is a village located in Darke County, Ohio. New Madison has a 2025 population of 822. New Madison is currently declining at a rate of -0.48% annually and its population has decreased by -2.26% since the most recent census, which recorded a population of 841 in 2020.
The average household income in New Madison is $72,046 with a poverty rate of 15.55%. The median age in New Madison is 47.2 years: 47.4 years for males, and 46 years for females.