Ben Lomond, CA has a population of 6,573 and is the 5,416th largest city in the United States. The population density is 786 per sq mi which is 238% higher than the California average and 768% higher than the national average. The median age in Ben Lomond is 43 which is approximately 19% higher than the California average of 36. In Ben Lomond, 59% of the population over 15 years of age are married, 92% speak English and 5% speak Spanish. 67% of Ben Lomond residents were born in California, 25% were born out of state, 2% were born outside of the United States and 7% were foreign born.