Bel Aire, KS has a population of 7,214 and is the 5,072nd largest city in the United States. The population density is 1,066 per sq mi which is 2940% higher than the Kansas average and 1077% higher than the national average. The median age in Bel Aire is 37 which is approximately 3% higher than the Kansas average of 36. In Bel Aire, 70% of the population over 15 years of age are married, 91% speak English and 3% speak Spanish. 66% of Bel Aire residents were born in Kansas, 29% were born out of state, 1% were born outside of the United States and 4% were foreign born.