Hamilton is located in Hancock county Illinois with a geographic area of 3.6 square miles. The total population in Hamilton is 2,808 with 44.5% male and 55.5% female. Children under age 5 represent 3.8% of the population, under age 18 equal 23.4% of the population and over age 65 is 20.4% of the population. The median household income is $49,566, per capita income is $30,152. There are a total of 1,137 housing units with 73.8% owner occupied. Education includes 36.2% of residents that are high school graduates and 18.8% with a bachelor's degree or higher. The average temperature in Hamilton in the summer is 74 degrees, and in the winter 27 degrees.