Sleepy Hollow, CA has a population of 2,275 and is the 10,318th largest city in the United States. The population density is 762 per sq mi which is 228% higher than the California average and 741% higher than the national average. The median age in Sleepy Hollow is 48 which is approximately 34% higher than the California average of 36. In Sleepy Hollow, 68% of the population over 15 years of age are married, 87% speak English and 2% speak Spanish. 52% of Sleepy Hollow residents were born in California, 35% were born out of state, 1% were born outside of the United States and 12% were foreign born.