Trinidad, CA has a population of 209 and is the 24,260th largest city in the United States. The population density is 431 per sq mi which is 85% higher than the California average and 376% higher than the national average. The median age in Trinidad is 61 which is approximately 69% higher than the California average of 36. In Trinidad, 63% of the population over 15 years of age are married, 94% speak English and 3% speak Spanish. 51% of Trinidad residents were born in California, 37% were born out of state, 1% were born outside of the United States and 11% were foreign born.