Rapid River is an unincorporated community in Masonville Township, Delta County in the U.S. state of Michigan.

The Rapid River ZIP code is 49878 and also serves areas in the nearby townships in Delta County of Baldwin, Bay de Noc, Brampton, Ensign, Garden, Maple Ridge, Masonville, and Nahma.

It also serves a small area in Mathias Township in Alger County[3] The community was first named Rapid Siding as a stop on the Minneapolis, St. Paul and Sault Ste.

[5] One scene from the 2001 film Escanaba in da Moonlight was shot in the Swallow Inn, a bar in Rapid River.

Indian Trails provides daily intercity bus service between St. Ignace and Ironwood, Michigan.