Grand Army of the Republic Hall is a historic clubhouse building located at Johnstown, Cambria County, Pennsylvania. It was built in 1893, and is a three-story brick building with a flat roof, three bays by seven bays. The front facade features two carved stone insets with a cannon and crossed sword motif. It was built by the local chapter of the Grand Army of the Republic and later converted to offices. The building was damaged in the Flood of 1977. It was added to the National Register of Historic Places in 1980. It is located in the Downtown Johnstown Historic District.