Carthage is located in Rush county Indiana with a geographic area of 0.6 square miles. The total population in Carthage is 891 with 48.4% male and 51.6% female. Children under age 5 represent 10.1% of the population, under age 18 equal 33.9% of the population and over age 65 is 14.6% of the population. The median household income is $37,917, per capita income is $18,748. There are a total of 341 housing units with 54.5% owner occupied. Education includes 47.8% of residents that are high school graduates and 7.9% with a bachelor's degree or higher. The average temperature in Carthage in the summer is 73 degrees, and in the winter 29 degrees.