Mountain Home, ID has a population of 13,823 and is the 3,028th largest city in the United States. The population density is 2,281 per sq mi which is 11855% higher than the Idaho average and 2418% higher than the national average. The median age in Mountain Home is 31 which is approximately 13% lower than the Idaho average of 36. In Mountain Home, 63% of the population over 15 years of age are married, 92% speak English and 4% speak Spanish. 32% of Mountain Home residents were born in Idaho, 58% were born out of state, 3% were born outside of the United States and 6% were foreign born.