what county is riverdale mi in
Riverdale (in Gratiot County, MI) Populated Place Profile. Riverdale (GNIS FID: 635974) is a populated place located within the Township of Seville, a minor civil division (MCD) of Gratiot County. The elevation of Riverdale is 794 feet. Riverdale appears on the Riverdale U.S. Geological Survey Map. Gratiot County is in the Eastern Time Zone (UTC -5 hours).