Michigan Township is one of fourteen townships in Clinton County, Indiana. As of the 2020 census, its population was 1,585 (down from 1,649 at 2010) and it contained 673 housing units. The township was named for the Michigan Road, an early thoroughfare through the area.
Mahlon Shinn and Robert Edwards were the township's first white settlers, arriving in 1830 and followed the same year by many more. The township was organized in March 1831.
According to the 2010 census, the township has a total area of , all land. Prior to settlement the land was heavily timbered with oak, poplar, walnut, sugar maple, beech, elm, ironwood, dogwood and pawpaw.
The township contains seven cemeteries: Brandon, Hopewell Cemeteries, Layman, Layton, Old Whiteman, Paris and Whiteman.