Groton is located in Brown county South dakota with a geographic area of 1.8 square miles. The total population in Groton is 1,842 with 48.8% male and 51.2% female. Children under age 5 represent 5.6% of the population, under age 18 equal 33.9% of the population and over age 65 is 16.1% of the population. The median household income is $76,765, per capita income is $32,658. There are a total of 660 housing units with 77.4% owner occupied. Education includes 35.3% of residents that are high school graduates and 19.4% with a bachelor's degree or higher. The average temperature in Groton in the summer is 70 degrees, and in the winter 15 degrees.
