Óskarsdóttir is an Icelandic patronymic (not a surname), literally meaning "daughter of Óskar". It may refer to:
Jónína Björk Óskarsdóttir (born 1953), Icelandic politician Steinunn Valdís Óskarsdóttir (born 1965), Icelandic politician Valdís Óskarsdóttir (born 1950), Icelandic film editor