Old Finland (Vanha Suomi in Finnish) is a name used for the areas that Sweden lost to Russia in the Great Northern War and in the Hats' Russian War. Old Finland was joined to the autonomous Grand Duchy of Finland in 1812.

• In the Treaty of Nystad in 1721, that concluded the Great Northern War, Sweden had to cede the province of Kexholm and province of Vyborg.

• In the Treaty of Turku in 1743 Sweden had to cede the areas in souther Karelia around the Kymi river and Savonlinna.

These areas were later referred to as Old Finland and in 1812 they were incorporated in the Grand Duchy of Finland. The population in these provinces were given the same rights as in the Grand Duchy.