Timo Juhani Vihavainen (born 9 May 1947) is a Finnish historian and a professor of Russian Studies at the University of Helsinki.
He has written extensively on Russian and Finnish history.
Vihavainen graduated as a Master of Philosophy in 1970, a Licentiate in Philosophy in 1983, a Doctor of Philosophy degree in 1988 and a Docent in Russian history in 1992.
He is a member of the Finnish Academy of Science and Letters since 2009.