Martinsburg, in Morrisons Cove, is a borough in Blair County, Pennsylvania, United States. The population was 2,236 at the 2000 census. It is part of the Altoona, PA Metropolitan Statistical Area.
Martinsburg is located at 40°18′38″N 78°19′32″W / 40.31056°N 78.32556°W / 40.31056; -78.32556 (40.310548, -78.325628).
According to the United States Census Bureau, the borough has a total area of 0.6 square miles (1.6 km²), all of it land.