Fall River, KS has a population of 152 and is the 25,613th largest city in the United States. The population density is 701 per sq mi which is 1897% higher than the Kansas average and 673% higher than the national average. The median age in Fall River is 40 which is approximately 10% higher than the Kansas average of 36. In Fall River, 69% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 76% of Fall River residents were born in Kansas, 24% were born out of state, 0% were born outside of the United States and 0% were foreign born.