The policy of Russification of Finland was a governmental policy of the Russian Empire aimed at limiting the special status of the Grand Duchy of Finland and possibly the termination of its political autonomy and cultural uniqueness in 1899–1905 and in 1908–1917, fully integrating Finland to the Russian Empire. It was a part of a larger policy of Russification pursued by late 19th–early 20th century Russian governments which tried to abolish cultural and administrative autonomy of non-Russian minorities within the empire.

The Grand Duchy of Finland, officially and also translated as the Grand Principality of Finland, was the predecessor state of modern Finland. It existed between 1809 and 1917 as an autonomous state ruled by the Russian Empire.