Foresthill, CA has a population of 1,229 and is the 13,886th largest city in the United States. The population density is 110 per sq mi which is 53% lower than the California average and 21% higher than the national average. The median age in Foresthill is 36 which is approximately 1% higher than the California average of 36. In Foresthill, 59% of the population over 15 years of age are married, 96% speak English and 4% speak Spanish. 66% of Foresthill residents were born in California, 32% were born out of state, 0% were born outside of the United States and 2% were foreign born.