Mifflin Township is one of the eighteen townships of Richland County, Ohio, United States. It is a part of the Mansfield Metropolitan Statistical Area. The 2000 census found 6,218 people in the township.GeographyLocated in the eastern part of the county, it borders the following townships: Weller Township – northMilton Township, Ashland County – northeast cornerMifflin Township, Ashland County – eastMonroe Township – southWashington Township – southwest cornerMadison Township – west No municipalities are located in Mifflin Township.Name and historyStatewide, other Mifflin Townships are located in Ashland, Franklin, Pike, and Wyandot counties.