Pioneer Square South and Pioneer Square North are a pair of light rail stations in Portland, Oregon, United States, served by TriMet as part of the MAX Light Rail system. Situated directly west of the Portland Transit Mall at Pioneer Courthouse Square in downtown Portland, they occupy the sidewalk on Yamhill and Morrison streets between Broadway and 6th Avenue. The stations consist of one side platform each; trains traveling eastbound stop at Pioneer Square South while trains traveling westbound stop at Pioneer Square North.
The Pioneer Square stations are among the 27 original stations of the Banfield Light Rail Project, which built the Metropolitan Area Express (MAX), Portland's first light rail line. They opened along with the inaugural service of MAX on September 5, 1986. The stations are currently served by the Blue Line, which operates between Hillsboro and Gresham, and the Red Line, which operates between Beaverton and Portland International Airport. The Yellow Line had served the stations from May 2004 until August 2009 when the line was rerouted to the Portland Transit Mall.
The Pioneer Square stations, along with the Pioneer Courthouse/Southwest 6th and Pioneer Place/Southwest 5th stations located one block east, mark the only transfer point where riders can board any of the five existing MAX lines.