Hailey, ID has a population of 8,058 and is the 4,656th largest city in the United States. The population density is 2,256 per sq mi which is 11726% higher than the Idaho average and 2390% higher than the national average. The median age in Hailey is 36 which is approximately 2% higher than the Idaho average of 36. In Hailey, 62% of the population over 15 years of age are married, 73% speak English and 26% speak Spanish. 34% of Hailey residents were born in Idaho, 47% were born out of state, 1% were born outside of the United States and 19% were foreign born.