Princeton is located in Bureau county Illinois with a geographic area of 8.2 square miles. The total population in Princeton is 7,589 with 43.7% male and 56.3% female. Children under age 5 represent 4.5% of the population, under age 18 equal 19.9% of the population and over age 65 is 27.8% of the population. The median household income is $51,844, per capita income is $31,187. There are a total of 3,453 housing units with 69.0% owner occupied. Education includes 28.7% of residents that are high school graduates and 30.0% with a bachelor's degree or higher. The average temperature in Princeton in the summer is 73 degrees, and in the winter 27 degrees.
