Kalevi Wiik (born 2 August 1932 in Turku) is a professor emeritus of phonetics at the University of Turku, Finland. He is best known for his controversial hypotheses about the effect of the Uralic languages on creation of various Indo-European languages in northern Europe, such as Germanic, Slavic, and Baltic languages. Like Marija Gimbutas before him, he has tried to combine archaeology with linguistics in order to locate the origins of European peoples. He also bases much of his hypothetical structures on results of genetics.

Wiik proposes Indo-European origins in Southeast Europe, using linguistic, genetic, archaeological and anthropological data which he interprets to support his hypotheses. He believes that from 23,000-8000 BC (the last Ice Age), inhabitation in Europe was in three main regions, refugios, whose populations then came to divide Europe between themselves. Western 'Basque' Europe and Northern 'Uralic' Europe were inhabited by hunters of large animals which were abundant during that period and spoke languages related respectively to modern Basque and Uralic. The rest of Europe was inhabited by hunters of smaller animals and was fragmented into many smaller unknown languages.