Sea Ranch, CA has a population of 1,092 and is the 14,593rd largest city in the United States. The population density is 68 per sq mi which is 71% lower than the California average and 25% lower than the national average. The median age in Sea Ranch is 68 which is approximately 90% higher than the California average of 36. In Sea Ranch, 75% of the population over 15 years of age are married, 93% speak English and 6% speak Spanish. 40% of Sea Ranch residents were born in California, 49% were born out of state, 1% were born outside of the United States and 10% were foreign born.