Filmore Township covers an area of 60.71 square miles (157.2 km2).

[1] Filmore Township was established in 1851, and named in honor President Millard Fillmore.

The population density was 8.03 people per square mile (3.10 people/km2).

Approximately 0.20% of the population were Hispanic or Latino of any race.

The township contains the following two unincorporated areas and historical communities: The township contains the following six cemeteries: Kinder Chapel, Burk, Mouser, Patterson, Ray, and Scott.