Garwin is located in Tama county Iowa with a geographic area of 1.0 square miles. The total population in Garwin is 640 with 55.2% male and 44.8% female. Children under age 5 represent 1.1% of the population, under age 18 equal 18.6% of the population and over age 65 is 18.6% of the population. The median household income is $51,125, per capita income is $28,659. There are a total of 269 housing units with 84.8% owner occupied. Education includes 40.5% of residents that are high school graduates and 10.0% with a bachelor's degree or higher. The average temperature in Garwin in the summer is 72 degrees, and in the winter 23 degrees.
