Atomic City, ID has a population of 17 and is the 28,841st largest city in the United States. The population density is 214 per sq mi which is 1022% higher than the Idaho average and 136% higher than the national average. The median age in Atomic City is 30 which is approximately 17% lower than the Idaho average of 36. In Atomic City, 73% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 59% of Atomic City residents were born in Idaho, 29% were born out of state, 0% were born outside of the United States and 12% were foreign born.