Alton, KS has a population of 126 and is the 26,247th largest city in the United States. The population density is 407 per sq mi which is 1060% higher than the Kansas average and 349% higher than the national average. The median age in Alton is 47 which is approximately 29% higher than the Kansas average of 36. In Alton, 59% of the population over 15 years of age are married, 92% speak English and 1% speak Spanish. 48% of Alton residents were born in Kansas, 44% were born out of state, 0% were born outside of the United States and 7% were foreign born.