Waterloo is a village in Douglas County, Nebraska, United States.

Waterloo was founded by Elias Kelsey and John Logan in 1883 after two failed attempts at incorporation.

According to the United States Census Bureau, the village has a total area of 0.65 square miles (1.68 km2), all land.

There were 359 housing units at an average density of 552.3 per square mile (213.2/km2).

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.

27.9% of all households were made up of individuals, and 9.8% had someone living alone who was 65 years of age or older.

None of the families and 1.4% of the population were living below the poverty line, including no under eighteens and 2.3% of those over 64.