Millhousen
- County:
- Decatur County
- County Seat:
- No
- Area (mi²):
- 0.901
- State:
- Indiana
Millhousen is a town located in Decatur County, Indiana. Millhousen has a 2026 population of 147. Millhousen is currently declining at a rate of 0% annually and its population has decreased by 0% since the most recent census, which recorded a population of 147 in 2020.
The median age in Millhousen is 47.9 years: 47.4 years for males, and 50.8 years for females. For every 100 females there are 152.2 males.