Earlham, IA has a population of 1,523 and is the 12,599th largest city in the United States. The population density is 1,574 per sq mi which is 2782% higher than the Iowa average and 1638% higher than the national average. The median age in Earlham is 36 which is approximately 6% lower than the Iowa average of 38. In Earlham, 64% of the population over 15 years of age are married, 99% speak English and 1% speak Spanish. 84% of Earlham residents were born in Iowa, 15% were born out of state, 0% were born outside of the United States and 0% were foreign born.