Logan, IA has a population of 1,540 and is the 12,522nd largest city in the United States. The population density is 1,535 per sq mi which is 2710% higher than the Iowa average and 1594% higher than the national average. The median age in Logan is 40 which is approximately 6% higher than the Iowa average of 38. In Logan, 58% of the population over 15 years of age are married, 99% speak English and 0% speak Spanish. 59% of Logan residents were born in Iowa, 40% were born out of state, 1% were born outside of the United States and 0% were foreign born.