Princeton is a city located in Bureau County Illinois. Princeton has a 2020 population of 8,642. It is also the county seat of Bureau County. Princeton is currently declining at a rate of -0.92% annually and its population has decreased by -7.38% since the most recent census, which recorded a population of 9,331 in 2010. Princeton reached it's highest population of 9,331 in 2010.
The average household income in Princeton is $72,099 with a poverty rate of 13.20%. The median rental costs in recent years comes to $650 per month, and the median house value is $132,900. The median age in Princeton is 47.9 years, 45.8 years for males, and 49.7 years for females.