Udell, IA has a population of 37 and is the 28,453rd largest city in the United States. The population density is 116 per sq mi which is 113% higher than the Iowa average and 28% higher than the national average. The median age in Udell is 72 which is approximately 90% higher than the Iowa average of 38. In Udell, 76% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 68% of Udell residents were born in Iowa, 32% were born out of state, 0% were born outside of the United States and 0% were foreign born.