Martinsburg is a town in Lewis County, New York, United States.

[3] The town is named after its founding father, General Walter Martin.

The town hall in Martinsburg, built in 1812, is the site of the first county court session, held the same year.

The Gen. Walter Martin House and Martinsburg Town Hall are listed on the National Register of Historic Places.

The western part of Martinsburg is on the Tug Hill Plateau.

22.8% of all households were made up of individuals, and 8.2% had someone living alone who was 65 years of age or older.