Guðmundur Guðmundsson may refer to:
Guðmundur Guðmundsson (handballer) (born 1960), former coach of the Icelandic men's handball team Guðmundur Guðmundsson (Mormon) (1825–1883), Mormon convert and missionary for The Church of Jesus Christ of Latter-day Saints to Iceland Erró (Guðmundur Guðmundsson, born 1932), Icelandic postmodern artist Guðmundur Guðmundsson (alpine skier) (1920–2007), Icelandic alpine skier Guðmundur Ívarsson Guðmundsson (1909–1987), Icelandic politician