| Birth Date: | 11 January 1961 |
| Birth Place: | Hafnarfjörður, Iceland[1] |
| Citizenship: | Icelandic |
| Office1: | Leader of the Socialist Party of Iceland |
| Term Start1: | 1 May 2017 |
| Term End1: | October 2024 |
| Predecessor1: | Party established |
| Successor1: | Sanna Magdalena Mörtudóttir |
| Party: | Socialist Party |
Gunnar Smári Egilsson (born 11 January 1961) is an Icelandic journalist, publisher, and editor.[2] He was one of the founders of Fréttablaðið and the weekly Eintak and Morgunpóstur as well as editing the weekly Pressan.[3] In addition, he was one of the founders and publishers of Nyhedsavisen, which was published in Denmark on the model of Fréttablaðið, and one of the owners and editors of Fréttatíminn.[4]
Smári has held various other positions and was, among other things, the managing director of for a time.[5] In 2014 established Fylkisflokkurinn (lit: “The County Party), a group that advocated for the unification of Norway and Iceland. Gunnar wrote various articles where he called that Iceland became one of Norway's counties, for the abolition of the presidency and replacing it with a governor, that Icelandic would become an official language of Norway, and that the Icelandic flag would become the county flag.[6] Gunnar later founded Socialist Party of Iceland political party in 2017.[7]