Waterloo is located in Douglas county Nebraska with a geographic area of 0.6 square miles. The total population in Waterloo is 1,066 with 45.3% male and 54.7% female. Children under age 5 represent 4.6% of the population, under age 18 equal 31.8% of the population and over age 65 is 10.5% of the population. The median household income is $64,659, per capita income is $27,502. There are a total of 377 housing units with 72.4% owner occupied. Education includes 40.8% of residents that are high school graduates and 18.0% with a bachelor's degree or higher. The average temperature in Waterloo in the summer is 72 degrees, and in the winter 26 degrees.