Plummer is a city in Benewah County, Idaho, United States. The population was 1,044 at the 2010 census, up from 990 in 2000. It is the largest city within the Coeur d'Alene Reservation, and is accessed by U.S. Route 95, the state's primary north–south highway.

Benewah County is a county located in the northwest part of the U.S. state of Idaho. As of the 2020 United States Census the county had a population of 9,530. The county seat and largest city is St. Maries, which has some area inside the Coeur d'Alene Reservation.