Bennett, IA has a population of 360 and is the 21,444th largest city in the United States. The population density is 1,844 per sq mi which is 3275% higher than the Iowa average and 1935% higher than the national average. The median age in Bennett is 45 which is approximately 18% higher than the Iowa average of 38. In Bennett, 64% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 77% of Bennett residents were born in Iowa, 22% were born out of state, 0% were born outside of the United States and 1% were foreign born.