Bonny Doon, CA has a population of 3,117 and is the 8,611th largest city in the United States. The population density is 187 per sq mi which is 20% lower than the California average and 106% higher than the national average. The median age in Bonny Doon is 49 which is approximately 36% higher than the California average of 36. In Bonny Doon, 62% of the population over 15 years of age are married, 89% speak English and 7% speak Spanish. 60% of Bonny Doon residents were born in California, 30% were born out of state, 3% were born outside of the United States and 7% were foreign born.