Viðar is an Icelandic given name and surname. Notable people with the name include:
Atli Viðar Björnsson (born 1980), Icelandic footballer
Viðar Halldórsson (born 1953), Icelandic footballer
Viðar Örn Kjartansson (born 1990), Icelandic footballer
See also
Víðarr