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.

West Michigan and Western Michigan are terms for a region in the U.S. state of Michigan's Lower Peninsula. Generally, it refers to the Grand Rapids-Muskegon-Holland area, and more broadly to most of the region along the Lower Peninsula's Lake Michigan shoreline, but there is no official definition.