Lamont, CA has a population of 15,439 and is the 2,763rd largest city in the United States. The population density is 3,364 per sq mi which is 1347% higher than the California average and 3613% higher than the national average. The median age in Lamont is 26 which is approximately 28% lower than the California average of 36. In Lamont, 51% of the population over 15 years of age are married, 13% speak English and 86% speak Spanish. 54% of Lamont residents were born in California, 4% were born out of state, 1% were born outside of the United States and 42% were foreign born.