Greenleaf, ID has a population of 1,530 and is the 12,570th largest city in the United States. The population density is 1,986 per sq mi which is 10311% higher than the Idaho average and 2092% higher than the national average. The median age in Greenleaf is 31 which is approximately 14% lower than the Idaho average of 36. In Greenleaf, 55% of the population over 15 years of age are married, 64% speak English and 35% speak Spanish. 62% of Greenleaf residents were born in Idaho, 29% were born out of state, 1% were born outside of the United States and 8% were foreign born.