Oak Grove is an unincorporated community in St. Francois Township in Madison County, Missouri, United States. It is located on Route 72, approximately six miles west of Fredericktown.
It received its name from its location in a grove of oak trees.
- ^ A Directory of Towns, Villages, and Hamlets Past and Present of Madison County, Missouri "A Directory of Towns, Villages, and Hamlets of Missouri". Archived from the original on October 4, 2013. Retrieved August 31, 2013.
- ^ "Madison County Place Names, 1928–1945". The State Historical Society of Missouri. Archived from the original on June 24, 2016. Retrieved November 2, 2016.
Coordinates: 37°34′22″N 90°23′41″W / 37.57278°N 90.39472°W