Shell rock is located in Butler county Iowa with a geographic area of 1.6 square miles. The total population in Shell rock is 1,646 with 48.3% male and 51.7% female. Children under age 5 represent 9.5% of the population, under age 18 equal 27.9% of the population and over age 65 is 15.4% of the population. The median household income is $56,250, per capita income is $34,653. There are a total of 654 housing units with 74.8% owner occupied. Education includes 30.3% of residents that are high school graduates and 18.8% with a bachelor's degree or higher. The average temperature in Shell rock in the summer is 72 degrees, and in the winter 23 degrees.