Waterloo, WI

Waterloo is a city located in Outagamie County, Wisconsin. The population was 25,521 at the 2010 census. Waterloo was founded in 1836 and is the county seat of Outagamie County.

According to the United States Census Bureau, the city has a total area of , of which is land and is water.

As of the census of 2010, there were 25,521 people, 10,853 households, and 7,914 families residing in the city. The population density was . There were 11,287 housing units at an average density of . The racial makeup of the city was 97.4% White, 0.2% African American, 0.3% Native American, 0.7% Asian, 0.1% from other races, and 1.6% from two or more races