Filer Charter Township is a charter township of Manistee County in the U.S. state of Michigan. The population was 2,318 at the 2020 census. just south of the city of Manistee on the south shore of Manistee Lake. The Filer City post office opened March 10, 1868. It was discontinued on April 12, 1871, and reestablished on July 13, 1883.

  • Oak Hill is an unincorporated community and census-designated place in the northeastern part of the township, bordered to the east by Filer City, to the north by Manistee, to the northeast by Manistee Lake, and to the west by U.S. Route 31.

Geography

The township is in southwestern Manistee County, bordered to the south by Mason County and to the west by Lake Michigan. The city of Manistee borders the township to the north, and Stronach Township is to the east.

According to the United States Census Bureau, Filer Charter Township has a total area of , of which , or 2.40%, are water.