Folsom, CA has a population of 74,960 and is the 473rd largest city in the United States. The population density is 2,705 per sq mi which is 1064% higher than the California average and 2886% higher than the national average. The median age in Folsom is 40 which is approximately 12% higher than the California average of 36. In Folsom, 61% of the population over 15 years of age are married, 80% speak English and 5% speak Spanish. 60% of Folsom residents were born in California, 23% were born out of state, 1% were born outside of the United States and 16% were foreign born.