Mountain Home is the largest city in Elmore County with a population of 14,206 per the 2010 U.S. Census, and it is also the principal city of the “Mountain Home, Idaho Micropolitan Statistical Areaâ€, which includes Elmore County. Additionally, due to its proximity to Boise - one of the fastest-growing cities in the nation - Mountain Home is considered the next suburb of Boise and is getting a lot of attention.