Princeton, TX has a population of 8,278 and is the 4,586th largest city in the United States. The population density is 965 per sq mi which is 896% higher than the Texas average and 966% higher than the national average. The median age in Princeton is 33 which is approximately 4% lower than the Texas average of 34. In Princeton, 61% of the population over 15 years of age are married, 81% speak English and 17% speak Spanish. 55% of Princeton residents were born in Texas, 33% were born out of state, 1% were born outside of the United States and 11% were foreign born.