Interstate 84 (I-84) in the U.S. state of Idaho is a major Interstate Highway that traverses the state from the Oregon state line in the northwest to Utah state line in the southeast. It primarily follows the Snake River across a plain that includes the cities of Boise, Mountain Home, and Twin Falls. The highway is one of the busiest in Idaho and is designated as the Vietnam Veterans Memorial Highway.

Mountain Home is the largest city and county seat of Elmore County, Idaho, United States. The population was 15,979 in the 2020 census. It is the principal city of the Mountain Home Micropolitan Statistical Area, which includes Elmore County.