Waterloo is a village in Douglas County, Nebraska, United States. The population was 848 at the 2010 census.
Waterloo was founded circa 1870 when the Union Pacific Railroad was extended to that point. The name commemorates the Battle of Waterloo.
Waterloo is located at 41°17′13″N 96°17′18″W (41.287021, -96.288387).
According to the United States Census Bureau, the village has a total area of 0.65 square miles (1.68 km2), all land.
As of the census of 2010, there were 848 people, 337 households, and 229 families living in the village. The population density was 1,304.6 inhabitants per square mile (503.7/km2). There were 359 housing units at an average density of 552.3 per square mile (213.2/km2). The racial makeup of the village was 95.9% White, 0.6% African American, 1.2% Native American, 1.1% from other races, and 1.3% from two or more races. Hispanic or Latino of any race were 6.5% of the population.
There were 337 households of which 30.6% had children under the age of 18 living with them, 57.0% were married couples living together, 8.0% had a female householder with no husband present, 3.0% had a male householder with no wife present, and 32.0% were non-families. 27.0% of all households were made up of individuals and 9.5% had someone living alone who was 65 years of age or older.