River Falls, AL has a population of 729 and is the 17,210th largest city in the United States. The population density is 107 per sq mi which is 16% higher than the Alabama average and 18% higher than the national average. The median age in River Falls is 40 which is approximately 3% higher than the Alabama average of 39. In River Falls, 55% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 76% of River Falls residents were born in Alabama, 23% were born out of state, 0% were born outside of the United States and 0% were foreign born.