Dunayevsky, Dunayevski, Dunayevskii, Dunaevsky, etc. () is an East Slavic masculine surname, its feminine counterpart is Dunayevskaya or Dunayevskaia. The surname derives from the Danube River, which is called Dunay in Russian.
The Polish-language equivalent is Dunajewski.
The surname may refer to Isaak Dunayevsky (1900–1955), Soviet film composer and conductor Maksim Dunayevsky (born 1945), Soviet film composer, son of Isaak Raya Dunayevskaya (1910–1987), American Marxist Plane Jane (born 1998), American drag queen