Arrowsmith is located in Mclean county Illinois with a geographic area of 0.2 square miles. The total population in Arrowsmith is 404 with 49.8% male and 50.2% female. Children under age 5 represent 3.2% of the population, under age 18 equal 27.7% of the population and over age 65 is 21.8% of the population. The median household income is $68,750, per capita income is $19,256. There are a total of 130 housing units with 88.5% owner occupied. Education includes 50.8% of residents that are high school graduates and 18.5% with a bachelor's degree or higher. The average temperature in Arrowsmith in the summer is 74 degrees, and in the winter 27 degrees.