The Saimaa Canal (Finnish: Saimaan kanava; Swedish: Saima kanal; Russian: Сайменский канал) is a transportation canal that connects lake Saimaa with the Gulf of Finland near Vyborg, Russia.

The network of deep channels in Lake Saimaa with at least a draught of 4.2 m (14 ft) covers 814 km (506 mi).

In the Moscow Peace Treaty of 1940, Finland ceded the Karelian Isthmus and Vyborg to the Soviet Union; control of the canal was divided and traffic ended.

Finland obtained a 50-year lease on the Soviet part of the canal and Maly Vysotsky Island (Ravansaari) in 1963.

Regulations pertaining to maritime rules and employment of canal staff fall under Finnish jurisdiction; in all other cases Russian laws apply.