Fremont Township is one of sixteen townships in Buchanan County, Iowa, United States.

As of the 2000 census, its population was 271.

Fremont Township covers an area of 36.54 square miles (94.6 km2) and contains no incorporated settlements.

According to the USGS, it contains one cemetery, Fremont.

This article about the geography of Buchanan County, Iowa is a stub.