Melvin, IA has a population of 235 and is the 23,725th largest city in the United States. The population density is 1,325 per sq mi which is 2325% higher than the Iowa average and 1362% higher than the national average. The median age in Melvin is 40 which is approximately 6% higher than the Iowa average of 38. In Melvin, 64% of the population over 15 years of age are married, 88% speak English and 11% speak Spanish. 71% of Melvin residents were born in Iowa, 28% were born out of state, 0% were born outside of the United States and 2% were foreign born.