Grizzly Flats, CA has a population of 846 and is the 16,213th largest city in the United States. The population density is 128 per sq mi which is 45% lower than the California average and 41% higher than the national average. The median age in Grizzly Flats is 46 which is approximately 28% higher than the California average of 36. In Grizzly Flats, 56% of the population over 15 years of age are married, 98% speak English and 2% speak Spanish. 64% of Grizzly Flats residents were born in California, 36% were born out of state, 0% were born outside of the United States and 0% were foreign born.