The Finnish Declaration of Independence (Finnish: Suomen itsenäisyysjulistus; Swedish: Finlands självständighetsförklaring; Russian: Провозглашение независимости Финляндии) was adopted by the Parliament of Finland on 6 December 1917. It declared Finland an independent nation, ending its autonomy within Russia as the Grand Principality of Finland, with reference to a bill simultaneously delivered to the Parliament to make Finland an independent republic instead.

Declaring independence was only part of the long process leading to the independence of Finland. The declaration is celebrated as Independence Day in Finland.