Allen is a village in Dixon County, Nebraska, United States. It is part of the Sioux City, IA–NE–SD Metropolitan Statistical Area. The population was 411 at the 2000 census.
Allen is located at 42°24′56″N 96°50′41″W / 42.41556°N 96.84472°W / 42.41556; -96.84472 (42.415674, -96.844587).
According to the United States Census Bureau, the village has a total area of 0.4 square miles (1.0 km²), all of it land.