Lenox, IA has a population of 1,424 and is the 13,002nd largest city in the United States. The population density is 720 per sq mi which is 1217% higher than the Iowa average and 694% higher than the national average. The median age in Lenox is 41 which is approximately 8% higher than the Iowa average of 38. In Lenox, 66% of the population over 15 years of age are married, 74% speak English and 25% speak Spanish. 53% of Lenox residents were born in Iowa, 32% were born out of state, 3% were born outside of the United States and 13% were foreign born.