The Reykjavík Marathon (Icelandic: Reykjavíkurmaraþon) is an annual marathon set in Reykjavík, Iceland, held to coincide with the city's Cultural Night Festival in mid-August.

It has taken place every year since 1984, with the exception of 2020 and 2021.

[1] Along with the full marathon a half marathon and several races of shorter distances are arranged.

In 2011 a total of 12,481 people competed in the various events that were held,[2] 595 solely in the full marathon.

[3] Since 2006 the marathon has been sponsored by the Icelandic bank Íslandsbanki, known as Glitnir between 2006 and 2009.