Richfield Township is a civil township of Genesee County in the U.S. state of Michigan. The population was 8,991 at the 2020 census, up from 8,730 at the 2010 census. On Monday November 27, 2017, the northern loop set of municipalities, including Richfield, began receiving water from the Karegnondi Water Authority pipeline and treated by Genesee Count…Richfield Township is a civil township of Genesee County in the U.S. state of Michigan. The population was 8,991 at the 2020 census, up from 8,730 at the 2010 census. On Monday November 27, 2017, the northern loop set of municipalities, including Richfield, began receiving water from the Karegnondi Water Authority pipeline and treated by Genesee County Drain Commission Water and Waste Division.