Donskoy is a Russian surname. Notable people with this surname include:
Alexander Donskoy (born 1970), mayor of Arkhangelsk, Russia Boris Donskoy (1894 or 1896–1918), Russian revolutionary Dmitry Donskoy (1350–1389), Grand Prince of Moscow (1359–1389) and Grand Prince of Vladimir (1363–1389) Evgeny Donskoy (born 1990), Russian professional tennis player Joonas Donskoi (born 1992), Finnish professional ice hockey player Mark Donskoy (1906–1985), Soviet film director Mikhail Donskoy (1948–2009), Soviet and Russian computer scientist