Mier
- County:
- Grant County
- County Seat:
- No
- Area (mi²):
- 0.239
- State:
- Indiana
Mier is a CDP located in Grant County, Indiana. Mier has a 2025 population of 18. Mier is currently declining at a rate of -57.14% annually and its population has decreased by -57.14% since the most recent census, which recorded a population of 42 in 2020.
The median age in Mier is 51.5 years: 0 years for males, and 0 years for females.