what county is gravois mills mo
Gravois Mills, MO. Sponsored Topics. Gravois Mills is a village in Morgan County, Missouri, United States. The population was 208 at the 2000 census, at which time it was a town. Gravois Mills is located at 38Â°18â²26â³N 92Â°49â²20â³W / 38.30722Â°N 92.82222Â°W / 38.30722; -92.82222 (38.307354, -92.822152).