Melbourne, IA has a population of 821 and is the 16,427th largest city in the United States. The population density is 1,452 per sq mi which is 2557% higher than the Iowa average and 1502% higher than the national average. The median age in Melbourne is 37 which is approximately 2% lower than the Iowa average of 38. In Melbourne, 58% of the population over 15 years of age are married, 99% speak English and 0% speak Spanish. 86% of Melbourne residents were born in Iowa, 13% were born out of state, 0% were born outside of the United States and 1% were foreign born.