Penn Treaty Park is a small park on the western bank of the Delaware river, in the Fishtown neighborhood of Philadelphia, Pennsylvania. It is located at the intersection of Delaware (Columbus) Avenue and Beach Street, just off Delaware Avenue.

The southern part of the park consists of a walkway surrounding an open green favored by dog walkers and lunchtime picnickers. A stand of mature trees shades the northern part of the park. At the river's edge, the park provides an unimpeded view of the full span of the Benjamin Franklin Bridge that connects Philadelphia to the city of Camden, New Jersey. Directly to the north is a power-generating station owned and operated by the Philadelphia Electric Company (PECO). Bordering the southern edge of the park there was a nightclub with part of its facilities built on a reclaimed pier that stretches out into the river, however this is gone and will soon become a condominium development. An iron and concrete fishing pier used to extend out into the river, but it was seriously damaged by an out-of-control barge, fenced off for a while and then eventually done away with.