Rathdrum is a city in Kootenai County, Idaho, United States. The population was 6,826 at the 2010 census, up from 4,816 in 2000. It is part of the Coeur d'Alene Metropolitan Statistical Area, which includes the entire county. It is named after Rathdrum, a village in County Wicklow, Ireland.

Kootenai County is located in the U.S. state of Idaho. As of the 2020 census, its population was 171,362, making it the third-most populous county in Idaho and by far the largest in North Idaho, the county accounting for 45.4% of the region's total population. The county seat and largest city is Coeur d'Alene. The county was established in 1864 and named after the Kootenai tribe.