Foothill Farms, CA has a population of 33,384 and is the 1,275th largest city in the United States. The population density is 7,953 per sq mi which is 3322% higher than the California average and 8678% higher than the national average. The median age in Foothill Farms is 33 which is approximately 8% lower than the California average of 36. In Foothill Farms, 50% of the population over 15 years of age are married, 69% speak English and 15% speak Spanish. 60% of Foothill Farms residents were born in California, 17% were born out of state, 1% were born outside of the United States and 22% were foreign born.