Princeton, CA has a population of 257 and is the 23,293rd largest city in the United States. The population density is 140 per sq mi which is 40% lower than the California average and 54% higher than the national average. The median age in Princeton is 55 which is approximately 52% higher than the California average of 36. In Princeton, 72% of the population over 15 years of age are married, 71% speak English and 29% speak Spanish. 81% of Princeton residents were born in California, 8% were born out of state, 0% were born outside of the United States and 11% were foreign born.