Geneseo Township is one of sixteen townships in Cerro Gordo County, Iowa, United States. As of the 2000 census, its population was 1,206.
Geneseo Township covers an area of 36.02 square miles (93.29 km2) and contains one incorporated settlement, Rockwell. According to the USGS, it contains two cemeteries: Linn Grove and Sacred Heart. The city of Sheffield borders it to the south.