Lagunitas-Forest Knolls, CA has a population of 1,530 and is the 12,569th largest city in the United States. The population density is 360 per sq mi which is 55% higher than the California average and 298% higher than the national average. The median age in Lagunitas-Forest Knolls is 45 which is approximately 24% higher than the California average of 36. In Lagunitas-Forest Knolls, 47% of the population over 15 years of age are married, 90% speak English and 9% speak Spanish. 62% of Lagunitas-Forest Knolls residents were born in California, 32% were born out of state, 2% were born outside of the United States and 4% were foreign born.