Heidelberg
- County:
- Le Sueur County
- County Seat:
- No
- Area (mi²):
- 0.524
- State:
- Minnesota
Heidelberg is a city located in Le Sueur County, Minnesota. Heidelberg has a 2026 population of 135. Heidelberg 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 135 in 2020.
The median household income in Heidelberg is $115,417 with a poverty rate of 0.43%. The median age in Heidelberg is 39.3 years: 26.6 years for males, and 39.5 years for females. For every 100 females there are 139.8 males.