Hidden Springs, ID has a population of 2,474 and is the 9,920th largest city in the United States. The population density is 979 per sq mi which is 5032% higher than the Idaho average and 981% higher than the national average. The median age in Hidden Springs is 34 which is approximately 4% lower than the Idaho average of 36. In Hidden Springs, 75% of the population over 15 years of age are married, 98% speak English and 0% speak Spanish. 43% of Hidden Springs residents were born in Idaho, 54% were born out of state, 1% were born outside of the United States and 1% were foreign born.