Mulvane, KS has a population of 5,461 and is the 6,096th largest city in the United States. The population density is 1,232 per sq mi which is 3412% higher than the Kansas average and 1260% higher than the national average. The median age in Mulvane is 43 which is approximately 19% higher than the Kansas average of 36. In Mulvane, 64% of the population over 15 years of age are married, 99% speak English and 0% speak Spanish. 78% of Mulvane residents were born in Kansas, 19% were born out of state, 2% were born outside of the United States and 2% were foreign born.