Marcus Township is one of sixteen townships in Cherokee County, Iowa, United States.

As of the 2000 census, its population was 1,311.

Marcus Township covers an area of 36.59 square miles (94.8 km2) and contains one incorporated settlement, Marcus.

According to the USGS, it contains two cemeteries: Holy Name and Marcus-Amherst.

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