Lone Tree, IA has a population of 1,482 and is the 12,759th largest city in the United States. The population density is 1,396 per sq mi which is 2455% higher than the Iowa average and 1441% higher than the national average. The median age in Lone Tree is 37 which is approximately 3% lower than the Iowa average of 38. In Lone Tree, 65% of the population over 15 years of age are married, 96% speak English and 3% speak Spanish. 82% of Lone Tree residents were born in Iowa, 17% were born out of state, 0% were born outside of the United States and 1% were foreign born.