Morse Mill is an unincorporated community in Jefferson County, Missouri, United States. It is located about five miles northwest of Hillsboro.
A post office called Morse Mill has been in operation since 1859. The community is named after John H. Morse, the proprietor of a local mill.
Coordinates: 38°16′36″N 90°39′11″W / 38.27667°N 90.65306°W