| Al | Alþýðubandalag People's Alliance
 | 1971–1995 | 22.9% |  |  | 
      
      
        | Al | Alþýðuflokkur Social Democrat Party
 | 1916–1995 | 22.7% |  |  | 
      
      
        | Bn | Bændaflokkur Farmers' Party
 | 1916–1916 | 8.5% |  |  | 
      
      
        | Bn | Bændaflokkur Farmers' Party
 | 1934–1934 | 6.8% |  |  | 
      
      
        | Baja | Bandalag jafnaðarmanna Social Democratic Alliance
 | 1983–1983 | 7.3% |  |  | 
      
      
        | Bjfr | Björt framtíð Bright Future
 | 1999–2017 | 18.4% |  |  | 
      
      
        | Bo | Borgaraflokkur (i) Citizen's Party (i)
 | 1923–1923 | 56.1% |  |  | 
      
      
        | Boii | Borgaraflokkur (ii) Citizen's Party (ii)
 | 1987–1987 | 10.9% |  |  | 
      
      
        | Bo | Borgarahreyfingin Civic Movement
 | 2009–2009 | 7.2% |  |  | 
      
      
        | Dg | Dögun Dawn
 | 2013–2017 | 3.1% |  |  | 
      
      
        | El | Elected 
 | 1874–1914 | 100.0% |  |  | 
      
      
        | Flfl | Flokks fólksins People’s Party
 | 2016–2017 | 6.9% |  |  | 
      
      
        | FlHe | Flokkur Heimilanna Households Party
 | 2013–2013 | 3.0% |  |  | 
      
      
        | Fr | Framsóknarflokkur Progressive Party
 | 1919–2017 | 44.9% |  |  | 
      
      
        | Frfl | Frjálslyndi flokkurinn Liberal Party
 | 1926–1926 | 9.4% |  |  | 
      
      
        | Frfl | Frjálslyndi flokkurinn Liberal Party
 | 1999–2009 | 7.4% |  |  | 
      
      
        | He | Heimastjórnarflokkur Home Rule Party
 | 1916–1922 | 57.4% |  |  | 
      
      
        | ha | Íhaldsflokkur Conservative Party
 | 1926–1927 | 55.1% |  |  | 
      
      
        | sllila | Íslandshreyfingin – lifandi land Icelandic Movement
 | 2007–2007 | 3.3% |  |  | 
      
      
        | Ko | Kommúnistaflokkur Communist Party
 | 1933–1937 | 8.0% |  |  | 
      
      
        | Kv | Kvennalisti Women's List
 | 1922–1926 | 24.8% |  |  | 
      
      
        | Lajv | Landsmálaflokkur þjóðveldismanna Republican Party
 | 1942–1942 | 2.2% |  |  | 
      
      
        | Lr | Lýðræðisvaktin Democracy Watch
 | 2013–2013 | 2.5% |  |  | 
      
      
        | Lv | Lýðveldisflokkur Republic Party
 | 1953–1953 | 3.3% |  |  | 
      
      
        | Mi | Miðflokksins Centre Party
 | 2017–2017 | 10.9% |  |  | 
      
      
        | hibn | Óháðir bændur Independent Farmers
 | 1916–1916 | 22.1% |  |  | 
      
      
        | Pr | Píratar Pirate Party
 | 2013–2017 | 14.5% |  |  | 
      
      
        | Sa | Samfylkingin Social Democratic Alliance
 | 1999–2017 | 31.0% |  |  | 
      
      
        | Safrogvima | Samtök frjálslyndra og vinstri manna Union of Liberals and Leftists
 | 1971–1974 | 8.9% |  |  | 
      
      
        | Saumkv | Samtök um kvennalista Women's Alliance
 | 1983–1995 | 10.1% |  |  | 
      
      
        | Sjve | Sjáfstæðisflokkur ‘þversum’ Independence Party Radical
 | 1916–1916 | 7.4% |  |  | 
      
      
        | Sj | Sjálfstæðisflokkur (i) Independence Party (i)
 | 1916–1922 | 12.7% |  |  | 
      
      
        | Sjii | Sjálfstæðisflokkur (ii) Independence Party (ii)
 | 1930–2017 | 50.1% |  |  | 
      
      
        | Sjla | Sjálfstæðisflokkur ‘langsum Independence Party Moderate
 | 1916–1916 | 22.9% |  |  | 
      
      
        | Ss | Sósíalistaflokkur Socialist Party
 | 1942–1953 | 19.5% |  |  | 
      
      
        | Vi | Viðreisnar Regeneration
 | 2016–2017 | 10.5% |  |  | 
      
      
        | Vigrfr | Vinstrihreyfingin - grænt framboð Left Green Movement
 | 1999–2017 | 21.7% |  |  | 
      
      
        | ivhrfliv | Þióðvaki, hreyfing fólksins - Þióðvaki People's Movement
 | 1995–1995 | 7.2% |  |  | 
      
      
        | iv | Þióðvarnarflokkur National Preservation Party
 | 1953–1959 | 6.0% |  |  |