Bettendorf, IA has a population of 35,048 and is the 1,203rd largest city in the United States. The population density is 1,646 per sq mi which is 2912% higher than the Iowa average and 1716% higher than the national average. The median age in Bettendorf is 41 which is approximately 7% higher than the Iowa average of 38. In Bettendorf, 67% of the population over 15 years of age are married, 92% speak English and 1% speak Spanish. 52% of Bettendorf residents were born in Iowa, 40% were born out of state, 1% were born outside of the United States and 7% were foreign born.