Stoystown is a borough in Somerset County, Pennsylvania, United States. It is part of the Johnstown, Pennsylvania Metropolitan Statistical Area. The population was 428 at the 2000 census. Stoystown is located SSE of Johnstown and northeast of Somerset.
Stoystown is located at 40°6′10″N 78°57′14″W / 40.10278°N 78.95389°W / 40.10278; -78.95389 (40.102753, -78.953869).
According to the United States Census Bureau, the borough has a total area of 0.2 square miles (0.5 km²), all of it land.