Riverbank, CA has a population of 23,761 and is the 1,838th largest city in the United States. The population density is 5,867 per sq mi which is 2425% higher than the California average and 6376% higher than the national average. The median age in Riverbank is 32 which is approximately 12% lower than the California average of 36. In Riverbank, 58% of the population over 15 years of age are married, 49% speak English and 46% speak Spanish. 64% of Riverbank residents were born in California, 9% were born out of state, 1% were born outside of the United States and 25% were foreign born.