Lancaster is located in Fairfield county Ohio with a geographic area of 18.8 square miles. The total population in Lancaster is 40,438 with 49.5% male and 50.5% female. Children under age 5 represent 6.8% of the population, under age 18 equal 22.3% of the population and over age 65 is 17.4% of the population. The median household income is $44,794, per capita income is $25,230. There are a total of 16,451 housing units with 57.8% owner occupied. Education includes 37.2% of residents that are high school graduates and 20.9% with a bachelor's degree or higher. The average temperature in Lancaster in the summer is 71 degrees, and in the winter 32 degrees.
