Wattsburg is a borough in Erie County, Pennsylvania, United States. The population was 378 at the 2000 census. It is part of the Erie Metropolitan Statistical Area. Wattsburg is along the banks of French Creek (Allegheny River). Incorporated in 1833, Wattsburg was once a thriving stagecoach center. Wattsburg is notable as the home of Gary Kanis (better known as "Wattsburg Gary"), the number one user on the popular currency tracking website Where's George?.
Wattsburg is located at 42°0′10″N 79°48′34″W / 42.00278°N 79.80944°W / 42.00278; -79.80944 (42.002903, -79.809321).
According to the United States Census Bureau, the borough has a total area of 0.3 square miles (0.78 km2), all of it land.