St. George, KS has a population of 875 and is the 15,990th largest city in the United States. The population density is 1,290 per sq mi which is 3577% higher than the Kansas average and 1324% higher than the national average. The median age in St. George is 25 which is approximately 30% lower than the Kansas average of 36. In St. George, 62% of the population over 15 years of age are married, 99% speak English and 1% speak Spanish. 52% of St. George residents were born in Kansas, 47% were born out of state, 0% were born outside of the United States and 0% were foreign born.