Union city is located in Erie county Pennsylvania with a geographic area of 1.8 square miles. The total population in Union city is 3,148 with 44.0% male and 56.0% female. Children under age 5 represent 5.8% of the population, under age 18 equal 21.3% of the population and over age 65 is 23.0% of the population. The median household income is $42,281, per capita income is $23,906. There are a total of 1,393 housing units with 63.2% owner occupied. Education includes 52.3% of residents that are high school graduates and 12.6% with a bachelor's degree or higher. The average temperature in Union city in the summer is 73 degrees, and in the winter 33 degrees.