Árni Þór Sigurðsson (born 30 July 1960 in Reykjavik) is an Icelandic diplomat. Since 1 June 2020 he is Iceland's Ambassador to the Russian Federation, resided on Moscow, also accredited to Armenia, Azerbaijan, Belarus, Kazakhstan, Kyrgyzstan, Moldova, Tajikistan, Turkmenistan and Uzbekistan. He was Iceland's Ambassador to Finland, also accredited to Estonia, Latvia, Lithuania and Ukraine, resided in Helsinki, from 2018-2020. From 1 May 2015 he was Ambassador for Arctic affairs (Senior Arctic Official), representing Iceland in the Arctic Council. He was member of parliament of the Althing, the Icelandic parliament 2007–2014, for the Left-Green Movement. He was Deputy Speaker of the Althing from 2009 to 2010 and again 2012–2013. Chairman of the Foreign Affairs Committee of the Althingi Feb. 2009 - April 2013. Chairman of the Parliamentary Delegation to EFTA/EEA 2009–2013. Co-Chairman of the Iceland-EU Joint Parliamentary Committee. He was a delegate to the Nordic Council 2010-2013 and Chairman of the Nordic Council's Standing Committee of Culture and Education. Árni Þór held a number of Parliamentary Committee posts, incl. on budget and finance, economy, environment, constitutional affairs, procedural affairs etc. He was chair, vicechair and acting chair of the Parliamentary Group 2009–2012.