The Ingrians, sometimes called Ingrian Finns, are the Finnish population of Ingria, descending from Lutheran Finnish immigrants introduced into the area in the 17th century, when Finland and Ingria were both parts of the Swedish Empire. In the forced deportations before and after World War II, and during the genocide of Ingrian Finns, most of them were relocated to other parts of the Soviet Union, or killed. Today the Ingrian Finns constitute the largest part of the Finnish population of the Russian Federation. According to some records, some 25,000 Ingrian Finns have returned or still reside in the region of Saint Petersburg.

Finnish is a Uralic language of the Finnic branch, spoken by the majority of the population in Finland and by ethnic Finns outside of Finland. Finnish is one of the two official languages of Finland. In Sweden, both Finnish and Meänkieli are official minority languages. The Kven language, which like Meänkieli is mutually intelligible with Finnish, is spoken in the Norwegian counties Troms and Finnmark by a minority group of Finnish descent.