Washington Square West is a neighborhood in Center City, Philadelphia, Pennsylvania, United States. The neighborhood roughly corresponds to the area between 7th and Broad Streets and between Chestnut and South Streets, bordering on the Independence Mall tourist area directly northeast, Market East to the north, Old City and Society Hill to the East, Bella Vista directly south, Hawthorne to the southwest, and mid-town Philadelphia and Rittenhouse Square to the west. The area takes its name from Washington Square, a historic urban park in the northeastern corner of the neighborhood. In addition to being a desirable residential community, it is considered a hip, trendy neighborhood that offers a diverse array of shops, restaurants, and coffee houses. Washington Square West contains many gay-friendly establishments, especially in the gay village area of the neighborhood commonly known as the Gayborhood, which hosts annual events celebrating LGBT culture in Philadelphia, including OutFest.

Center City includes the central business district and central neighborhoods of Philadelphia, Pennsylvania, United States. It comprises the area that made up the City of Philadelphia prior to the Act of Consolidation, 1854, which extended the city borders to be coterminous with Philadelphia County.