Martinsburg is a village in Dixon County, Nebraska, United States.

It is part of the Sioux City, IA–NE–SD Metropolitan Statistical Area.

[5] A post office was established at Martinsburg (also spelled historically Martinsburgh) in 1880, and remained in operation until it was discontinued in 1967.

[6] According to the United States Census Bureau, the village has a total area of 0.10 square miles (0.26 km2), all land.

28.9% of all households were made up of individuals, and 15.8% had someone living alone who was 65 years of age or older.

30.8% of all households were made up of individuals, and 20.5% had someone living alone who was 65 years of age or older.

There were no families and 5.8% of the population living below the poverty line, including no under eighteens and 57.1% of those over 64.