Port Credit is a neighbourhood in the south-central part of the City of Mississauga, Ontario, Canada, located at the mouth of the Credit River on the north shore of Lake Ontario. Its main intersection is Hurontario Street and Lakeshore Road, about 0.6 kilometres (0.37 mi) east of the river. Until 1974, Port Credit was an incorporated town. Its approximate boundaries are the Canadian National Railway to the north, Seneca Avenue to the east and Shawnmarr Road to the west. It had a population of 10,260 at the 2001 census.

Port Credit was originally a settlement of the Mississauga Ojibwe First Nations band and a trading post established in 1720 for the exchange of goods from the Europeans for furs trapped by the Mississaugas. After the War of 1812, a harbour was established by the Mississaugas together with European and Jamaican settlers. In 1847, the Mississaugas left the village to relocate on the Six Nations Reserve to be with other band members and first nations. Industry was established on the village periphery including an oil refinery, but the neighbourhood is no longer a substantial industrial district. The village survived into the 20th century, becoming an independent municipality in 1909, until it was merged with the City of Mississauga in 1974.

Today, the original core village is now a heritage conservation district. The harbour is mostly used for recreational boating.

In recent years, the population of Port Credit has increased significantly from condo developments as well as gaining summer attraction from other Mississauga neighbourhoods. A former Imperial Oil property has been cleaned-up and remediated to support residential growth. The 72 arce development will add as many as 3,900 residential units over ground-level retail units. Concerns have been raised about the development's impact on local traffic.

The location of Port Credit was in the 1700s, the land of the Mississauga Ojibwe band. The location became used as a meeting place between the band and white traders, and the river was known to them as the Missinhe or "trusting creek". To the French and later the English the mouth was known as "Port Credit" and a trading post was established in 1720, where goods were traded or bought on credit. The earliest reference is on a map drawn in 1757 by La Broquerie.

The first permanent structure built by the English at the site was the Government Inn (1798–1861), on the east bank of the river. Lieutenant Governor John Graves Simcoe had ordered construction of the Inn to serve as a way station for travellers by land and lake, and it was leased to a succession of residents until its destruction by fire.

In 1805, the Mississauga gave up much of the surrounding lands, but retained the Credit River, which they held in esteem as the favourite resort of their ancestors. After the War of 1812, the numbers of Mississauga dwindled and they gave up their lands except for a reserve at the mouth, believing the King would protect the land for them in the face of settler encroachment.

Outside the reserve, a village plan was laid out in 1834 and for several years, Port Credit was a thriving harbour community used by the natives and settlers jointly. Village lots were sold to settlers by the natives and the Port Credit Harbour Company, which developed the harbour, was jointly owned. The harbour was a working fishing port and a regional trading centre for grain and other agricultural products. A lighthouse was in use from 1882 to 1918 and remained standing until destroyed by fire in 1936.