Coeur d'Alene is a city and the county seat of Kootenai County, Idaho, United States. It is the most populous city in North Idaho and the principal city of the Coeur d'Alene Metropolitan Statistical Area. The population was 54,628 at the 2020 census. Coeur d'Alene is a satellite city of Spokane, which is located about thirty miles to the west in the state of Washington.