First National Bank Building commonly referred to as Penn Tower is a low-rise commercial building located in downtown Williamsport, Pennsylvania.

Penn Tower was built in 1913 and upon completion was the tallest building in the city and second in the state.

Through the year the building was converted from a factory to apartments to commercial space and is now a commercial building.

The building's structural system is made of steel and the facade is brick in an applied masonry system.

This article about a building or structure in Pennsylvania is a stub.