Guðmundur Ari Sigurjónsson

Guðmundur Ari Sigurjónsson (born 12 September 1988) is an Icelandic politician and member of the Althing. A member of the Social Democratic Alliance, he has represented the Southwest constituency since November 2024.

Guðmundur was born on 12 September 1988. He is the son of Sigurjón Gunnarsson and Edda Kjartansdóttir. He grew up in Seltjarnarnes and was educated at the Valhúsaskóli. He later studied at the Fjölbrautaskólinn við Ármúla, Verkmenntaskóli Austurlands and Fjölbrautaskólinn í Breiðholti.

Guðmundur was a social worker and project manager at the Selið community centre and Skelin youth centre in Seltjarnarnes. He was as a project manager at the Football Association of Iceland. He was chairman of the Association of Leisure Service Professionals . He was elected to the municipal council in Seltjarnarnes at the 2014 municipal elections. He was elected chairman of Samfylkingin's executive committee in October 2022, defeating incumbent Kjartan Valgarðsson.

Guðmundur is married to sports scientist Nanna Kaaber Árnadóttir and has two sons and a daughter.