As of the 2010 census, its population was 6,028 and it contained 2,817 housing units.

[2] Grant Township was originally called Lyon Township but it was changed in 1862 to honor Ulysses S. Grant.

He had just won a surrender by Confederate forces at Fort Donelson in Tennessee.

[3] According to the 2010 census, the township has a total area of 86.69 square miles (224.5 km2), of which 86.66 square miles (224.4 km2) (or 99.97%) is land and 0.03 square miles (0.078 km2) (or 0.03%) is water.

[2] The township contains one cemetery, Redtop.