Sheridan is located in La salle county Illinois with a geographic area of 2.1 square miles. The total population in Sheridan is 2,829 with 82.7% male and 17.3% female. Children under age 5 represent 1.6% of the population, under age 18 equal 8.6% of the population and over age 65 is 2.7% of the population. The median household income is $70,925, per capita income is $11,121. There are a total of 403 housing units with 79.9% owner occupied. Education includes 53.6% of residents that are high school graduates and 6.7% with a bachelor's degree or higher. The average temperature in Sheridan in the summer is 74 degrees, and in the winter 27 degrees.