Cadiz is located in Harrison county Ohio with a geographic area of 8.8 square miles. The total population in Cadiz is 3,169 with 44.5% male and 55.5% female. Children under age 5 represent 6.0% of the population, under age 18 equal 21.9% of the population and over age 65 is 24.9% of the population. The median household income is $44,519, per capita income is $28,000. There are a total of 1,361 housing units with 71.2% owner occupied. Education includes 41.0% of residents that are high school graduates and 17.3% with a bachelor's degree or higher. The average temperature in Cadiz in the summer is 73 degrees, and in the winter 32 degrees.