Stonyford, CA has a population of 306 and is the 22,392nd largest city in the United States. The population density is 106 per sq mi which is 55% lower than the California average and 17% higher than the national average. The median age in Stonyford is 43 which is approximately 18% higher than the California average of 36. In Stonyford, 50% of the population over 15 years of age are married, 99% speak English and 1% speak Spanish. 83% of Stonyford residents were born in California, 15% were born out of state, 0% were born outside of the United States and 2% were foreign born.