Grayson, CA has a population of 990 and is the 15,235th largest city in the United States. The population density is 4,440 per sq mi which is 1811% higher than the California average and 4801% higher than the national average. The median age in Grayson is 30 which is approximately 17% lower than the California average of 36. In Grayson, 52% of the population over 15 years of age are married, 23% speak English and 77% speak Spanish. 56% of Grayson residents were born in California, 5% were born out of state, 0% were born outside of the United States and 40% were foreign born.