Grabner is a German surname. Notable people with the surname include:
Hermann Grabner (1886–1969), Austrian composer and music teacherMaximilian Grabner (1905–1948), Austrian Gestapo chief in AuschwitzMichael Grabner (born 1987), Austrian professional ice hockey playerMichelle Grabner (born 1962), American painterSiegfried Grabner (born 1975), Austrian professional snowboarder