
Mariah Hill
- County:
- Spencer County
- County Seat:
- No
- Area (mi²):
- 1.015
- State:
- Indiana
Mariah Hill is a CDP located in Spencer County, Indiana. Mariah Hill has a 2025 population of 154. Mariah Hill is currently growing at a rate of 6.94% annually and its population has decreased by 0% since the most recent census, which recorded a population of 0 in 2020.
The average household income in Mariah Hill is $94,350 with a poverty rate of 0%. The median age in Mariah Hill is 75.9 years: 78.2 years for males, and 74.1 years for females.