Port Credit Secondary School (PCSS) is a high school located in the city of Mississauga, Ontario, and is a part of the Peel District School Board. It was the first secondary school in Peel, celebrating its 100th anniversary in May 2019. It is located just north of Port Credit, Ontario. It is home to two Peel Region programs, the one of a kind SciTech Program and the Strings Program.

The current PCSS building is located about one block east of Hurontario Street at 70 Mineola Rd. East. The school is in the neighbourhood of Mineola, east of Hurontario Street, north of the CN Railroad and south of the Queen Elizabeth Way. The original location of the school was on Forest Avenue, on the site of what is now Mentor College. The school moved to its current location, May 13, 1963.

The school's athletic teams are known as the Warriors. The Ultimate Frisbee team won the regional championship during the 2009-2010 season. In 2011, PCSS Warriors became the first Ultimate ROPSSAA Champions, winning the finals 14-13. The Warriors won their second ultimate frisbee title in 2014 and finished the season with an undefeated record of 11-0.

PCSS was a shooting location for the 2006 film The Naked Mile. In October 20, 2007, the school was used as a filming location for the film True Confessions of a Hollywood Starlet.