Madisonville is an unincorporated community in Ralls County, in the U.S. state of Missouri. The community lies about four miles southeast of Center and on on the banks of Spencer Creek.
Madisonville was platted in 1836, and named after James Madison Croswaite, the sibling of a first settler. A post office called Madisonville was established in 1838, and remained in operation until 1906.
Coordinates: 39°27′26″N 91°29′48″W / 39.45722°N 91.49667°W