International

Instant runoff voting is used in the following countries:

• Australia, to elect its House of Representatives since 1918 / To elect most state and local legislators
  
• Republic of Ireland, to elect its president since 1938
  
• United Kingdom to elect mayor of London since 2000 (supplementary vote form / To elect 13 other British city mayors  / For Scottish local elections to fill vacancies / For leadership elections of Labour Party and Liberal Democratic Party
  
• New Zealand, to elect imayor of its capital city Wellington since 2004 / Several other New Zealand cities use IRV for mayoral elections, include Dunedin
  
• Papua New Guinea, for parliamentary elections since 2004 (limited preferential voting variation with 3 rankings)
  
• Sri Lanka, to elect its president (contingent vote variation) since 1978
  
• Bosnia, for certain sub-national elections, since 2000
  
• Bougainville (autonomous region of Papua New Guinea) first used IRV (limited preferential voting format) for presidential elections in 2008 and for parliamentary elections in 2010
  
• Fiji, for parliamentary elections, since 1997
  
• Malta,  indirect elections for its president 
  
• India for indirect elections for president and to parliamentary vacancies
  
• Canada's Conservative Party and Liberal Party for leadership elections / Other leadership election uses including Progressive Conservative Party of Alberta and Liberal Party of British Columbia
  
• Hong Kong's Legislative Council has four functional constituencies that use a preferential elimination system with a limited electorate