11 Stanwix Street, formerly known as the Westinghouse Tower, is one of the major distinctive and recognizable features of Downtown Pittsburgh, Pennsylvania in the United States.

It was originally built and named for the Westinghouse Corporation; in 1999, that company went through a restructuring and moved its headquarters to its longtime research park in the suburb of Monroeville, before expansions in their operations necessitated a move to a larger suburban complex in Cranberry Township.

This tower rises 355 feet (108 meters) above Downtown Pittsburgh and is located near the Monongahela River.

During this building's early years, one of the tenants was Federal Home Loan Bank (FHLB) of Pittsburgh, which occupied the third and fourth floors.

As of June 2009, the building tenants were IBM, the Allegheny Conference on Community Development, the advertising firm Brunner, and the local headquarters of KeyCorp.