Coeur d'Alene is a city and the county seat of Kootenai County, Idaho, United States. It is the largest city in North Idaho and the principal city of the Coeur d'Alene Metropolitan Statistical Area. In 2019, the United States Census Bureau estimated the city's population at 52,414. Coeur d'Alene is a satellite city of Spokane, which is located about thirty miles (50 km) to the west in the state of Washington. The two cities are the key components of the Spokane–Coeur d'Alene combined statistical area, of which Coeur d'Alene is the third-largest city. The city is situated on the north shore of the 25-mile (40 km) long Lake Coeur d'Alene and to the west of the Coeur d'Alene Mountains. Locally, Coeur d'Alene is known as the "Lake City," or simply called by its initials, "CDA."