Ada is located in Hardin county Ohio with a geographic area of 2.1 square miles. The total population in Ada is 5,248 with 50.4% male and 49.6% female. Children under age 5 represent 2.8% of the population, under age 18 equal 11.1% of the population and over age 65 is 6.6% of the population. The median household income is $50,337, per capita income is $17,849. There are a total of 1,527 housing units with 41.7% owner occupied. Education includes 35.2% of residents that are high school graduates and 29.8% with a bachelor's degree or higher. The average temperature in Ada in the summer is 73 degrees, and in the winter 32 degrees.