Krievu valoda ir teritoriāli ļoti plaši izplatīta Eirāzijas kontinentā, un ir skaitliski lielākā no slāvu valodām. Krievu valoda pieder indoeiropiešu valodu saimei.

Russian is the most geographically widespread language of Eurasia, the most widely spoken of the Slavic languages, and the largest native language in Europe. Russian belongs to the family of Indo-European languages and is one of three living members of the East Slavic languages.