Tiffin is located in Johnson county Iowa with a geographic area of 4.2 square miles. The total population in Tiffin is 3,779 with 47.1% male and 52.9% female. Children under age 5 represent 6.8% of the population, under age 18 equal 27.7% of the population and over age 65 is 8.8% of the population. The median household income is $77,634, per capita income is $31,634. There are a total of 1,518 housing units with 75.8% owner occupied. Education includes 18.6% of residents that are high school graduates and 41.6% with a bachelor's degree or higher. The average temperature in Tiffin in the summer is 75 degrees, and in the winter 23 degrees.
