Volinia Township is a civil township of Cass County in the U.S. state of Michigan. The population was 1,174 at the 2000 census. When the township was organized in 1833, it was at first named Volhynia, after the province in Poland. It is believed to have been given to honor General Thaddeus Kosciusko, the Polish patriot who helped the United States during the American Revolutionary War. The name was altered first to "Volenia" and then to "Volinia".
In the traditional township numbering for the State of Michigan, Volinia Township is T 5 S, R 14 W.