About This Place
Oldenburg is a town in Ray Township, Franklin County, Indiana, United States. The population was 674 at the 2010 census.
Oldenburg is located at 39°20′22″N 85°12′17″W / 39.33944°N 85.20472°W / 39.33944; -85.20472 (39.339474, -85.204640).
According to the United States Census Bureau, the town has a total area of 0.4 square miles (1.1 km²), all of it land.