
Oldenburg
- County:
- Franklin County
- County Seat:
- No
- Area (mi²):
- 0.43
- State:
- Indiana
Oldenburg is a town located in Franklin County, Indiana. Oldenburg has a 2025 population of 650. Oldenburg is currently growing at a rate of 0.15% annually and its population has increased by 0.93% since the most recent census, which recorded a population of 644 in 2020.
The average household income in Oldenburg is $108,288 with a poverty rate of 21.18%. The median age in Oldenburg is 39.5 years: 35.3 years for males, and 50 years for females.