Sheridan is located in Madison county Montana with a geographic area of 1.0 square miles. The total population in Sheridan is 869 with 39.9% male and 60.1% female. Children under age 5 represent 3.6% of the population, under age 18 equal 14.8% of the population and over age 65 is 31.2% of the population. The median household income is $70,313, per capita income is $33,886. There are a total of 389 housing units with 83.0% owner occupied. Education includes 24.9% of residents that are high school graduates and 41.1% with a bachelor's degree or higher. The average temperature in Sheridan in the summer is 69 degrees, and in the winter 27 degrees.