Montrose is a town in Jasper County, Mississippi, United States. The population was 140 at the 2010 census. Montrose is located in northwestern Jasper County at 32°7′27″N 89°14′8″W / 32.12417°N 89.23556°W, in the southeastern corner of Bienville National Forest. Mississippi Highway 15 passes through the town, leading southwest …Montrose is a town in Jasper County, Mississippi, United States. The population was 140 at the 2010 census. Montrose is located in northwestern Jasper County at 32°7′27″N 89°14′8″W / 32.12417°N 89.23556°W, in the southeastern corner of Bienville National Forest. Mississippi Highway 15 passes through the town, leading southwest 11 miles to Bay Springs, the county seat, and northeast 16 miles to Newton.