Little River, KS has a population of 559 and is the 18,880th largest city in the United States. The population density is 1,433 per sq mi which is 3986% higher than the Kansas average and 1482% higher than the national average. The median age in Little River is 35 which is approximately 5% lower than the Kansas average of 36. In Little River, 65% of the population over 15 years of age are married, 99% speak English and 1% speak Spanish. 77% of Little River residents were born in Kansas, 22% were born out of state, 1% were born outside of the United States and 0% were foreign born.