Garðarsson is an Icelandic patronymic surname, literally meaning "son of Garðar". Notable people with the name include:
Bjarki Garðarsson (born 2010), Icelandic footballer Finnur Garðarsson (born 1952), Icelandic swimmer Gísli Örn Garðarsson (born 1973), Icelandic actor and director Sverrir Garðarsson (born 1984), Icelandic footballer