River Ridge, LA has a population of 13,706 and is the 3,047th largest city in the United States. The population density is 4,903 per sq mi which is 5428% higher than the Louisiana average and 5312% higher than the national average. The median age in River Ridge is 47 which is approximately 29% higher than the Louisiana average of 36. In River Ridge, 61% of the population over 15 years of age are married, 95% speak English and 3% speak Spanish. 78% of River Ridge residents were born in Louisiana, 19% were born out of state, 1% were born outside of the United States and 2% were foreign born.