Futebol Clube do Porto (Portuguese pronunciation: [futebɔɫ ˈklube du ˈpoɾtu]) (Euronext: FCP), commonly known as FC Porto, Porto, or FCP, is a Portuguese multi-sports club from the city of Porto, in the northern region of the country. Although they successfully compete in a number of different sports, FC Porto is mostly known for its association football team. Founded in Porto in September 28, 1893, it is one of the "Três Grandes" (Big Three, in English), football clubs in Portugal, with Benfica and Sporting CP being the other two clubs, FC Porto's biggest rivals. FC Porto's supporters are often called "Portistas" or "Dragões" (Dragons).

It is the most successful Portuguese football club in international competitions, with 7 titles, and the second most successful in domestic competitions, with 63 titles. It is also the most successful Portuguese football club in terms of total titles, with 70 titles.

Domestically, it holds the record of five Portuguese Liga titles in a row, having won the Portuguese Liga 25 times. Other national titles won by the club include the Championship of Portugal/Portuguese Cup 20 times and the Portuguese SuperCup 18 times. FC Porto has the distinction of being one of only two teams in the history of the Portuguese Liga to have completed an entire 30 game season (2010–11) unbeaten (the other being Benfica in the 1972–73 season). In the 2010–11 season, FC Porto achieved the largest difference ever between champion and runners-up (21 points).