Ionia County is a county located in the U.S. state of Michigan. As of the 2020 census, the population was 66,804. The county seat is Ionia. The Ionia County Courthouse was designed by Claire Allen, a prominent southern Michigan architect.

The Grand Rapids metropolitan area is a triangular shaped Metro Triplex, in West Michigan, which fans out westward from the primary hub city of Grand Rapids, Michigan, to the other two metro hubs of Muskegon and Holland. The metropolitan area had an estimated population of 1,059,113 in 2017. The region, noted in particular for its western edge abutting the Lake Michigan shoreline and its beaches, is a popular tourist and vacation destination during the summer. Noted popular metro area beach towns include Grand Haven, Holland, Muskegon, and Saugatuck.