Warren is located in Trumbull county Ohio with a geographic area of 16.0 square miles. The total population in Warren is 38,986 with 48.9% male and 51.1% female. Children under age 5 represent 5.8% of the population, under age 18 equal 20.5% of the population and over age 65 is 18.1% of the population. The median household income is $27,108, per capita income is $19,475. There are a total of 17,448 housing units with 52.0% owner occupied. Education includes 42.4% of residents that are high school graduates and 16.8% with a bachelor's degree or higher. The average temperature in Warren in the summer is 68 degrees, and in the winter 32 degrees.