Sterling, KS has a population of 2,490 and is the 9,878th largest city in the United States. The population density is 1,390 per sq mi which is 3863% higher than the Kansas average and 1434% higher than the national average. The median age in Sterling is 35 which is approximately 4% lower than the Kansas average of 36. In Sterling, 53% of the population over 15 years of age are married, 94% speak English and 2% speak Spanish. 56% of Sterling residents were born in Kansas, 40% were born out of state, 2% were born outside of the United States and 2% were foreign born.