Cadillac is a city in the U.S. state of Michigan and is the county seat of Wexford County. The population was 10,355 at the 2010 census. The city is situated at the junction of US 131, M-55 and M-115. The geographic center of Michigan is approximately five miles north-northwest of Cadillac.Cadillac became the county seat after the so-called "Battle of Manton," in which a show of force was involved in enforcing a controversial decision to move the county seat from Manton.