Jefferson Township, Butler County, IowaJefferson Township is one of sixteen townships in Butler County, Iowa, United States. As of the 2020 census, its population was 285.HistoryThe first white child was born in Jefferson Township in 1855.GeographyJefferson Township covers an area of and contains no incorporated settlements. According to the USGS, it contains three cemeteries: Butler Center, Coster and New Albion.