| Country | Political parties and leaders |
| Andorra |  Andorra for Change [Juan Eusebio NOMEN CALVET]; New Center [Vicenc MATEU] (formerly Andorran Democratic Center Party); Liberal Party of Andorra or PLA [Joan Gabriel i ESTANY] (formerly Liberal Union or UL); Reformist Coalition (includes the Liberal Party and New Center) [ Joan Gabriel i ESTANY]; Social Democratic Party or PS [Jaume BARTUMEU CASSANY] (formerly part of National Democratic Group or AND) |
| Angola | National Front for the Liberation of Angola or FNLA [Ngola KABANGU]; National Union for the Total Independence of Angola or UNITA (largest opposition party) [Isaias SAMAKUVA]; Popular Movement for the Liberation of Angola or MPLA (ruling party in power since 1975) [Jose Eduardo DOS SANTOS]; Social Renewal Party or PRS [Eduardo KUANGANA] note: nine other parties participated in the legislative election in September but won no seats |
| Anguilla | Anguilla United Front or AUF [Osbourne FLEMING, Victor BANKS] (a coalition of the Anguilla Democratic Party or ADP and the Anguilla National Alliance or ANA); Anguilla United Movement or AUM [Hubert HUGHES]; Anguilla Progressive Party or APP [Roy ROGERS]; Anguilla Strategic Alternative or ANSA [Edison BAIRD] |
| Antarctica | void |
| Antigua and Barbuda | Antigua Labor Party or ALP [Lester Bryant BIRD]; Barbudans for a Better Barbuda [Ordrick SAMUEL]; Barbuda People's Movement or BPM [Thomas H. FRANK]; Barbuda People's Movement for Change [Arthur NIBBS]; United Progressive Party or UPP [Baldwin SPENCER] (a coalition of three parties - Antigua Caribbean Liberation Movement or ACLM, Progressive Labor Movement or PLM, United National Democratic Party or UNDP) |
| Arctic Ocean | void |
| Argentina | Coalicion Civica (a broad coalition loosely affiliated with Elisa CARRIO); Front for Victory or FpV (a broad coalition, including elements of the UCR and numerous provincial parties) [Nestor KIRCHNER]; Interbloque Federal or IF (a broad coalition of approximately 12 parties including PRO); Justicialist Party or PJ [Nestor KIRCHNER]; Radical Civic Union or UCR [Gerardo MORALES]; Republican Proposal or PRO [Mauricio MACRI] (including Federal Recreate Movement or RECREAR [Esteban BULLRICH]; Socialist Party or PS [Ruben GIUSTINIANI]; Union For All [Patricia BULLRICH]; several provincial parties |
| Armenia | Armenian National Congress or ANC [Levon TER-PETROSSIAN]; Armenian National Movement or ANM [Ararat ZURABIAN]; Armenian People's Party [Tigran KARAPETIAN]; Armenian Ramkavar Azadagan Party Alliance or HRAK (includes former Dashink Party, National Revival Party, and Ramkavar Liberal Party); Armenian Revolutionary Federation ("Dashnak" Party) or ARF [Hrant MARKARIAN]; Heritage Party [Raffi HOVHANNISIAN]; National Democratic Party [Shavarsh KOCHARIAN]; National Democratic Union or NDU [Vazgen MANUKIAN]; National Unity Party [Artashes GEGHAMIAN]; People's Party of Armenia [Stepan DEMIRCHIAN]; Prosperous Armenia [Gagik TSAROUKIAN]; Republic Party [Aram SARKISIAN]; Republican Party of Armenia or HHK [Serzh SARGSIAN]; Rule of Law Party (Orinats Yerkir) [Artur BAGHDASARIAN]; Union of Constitutional Rights [Hrant KHACHATURIAN]; United Labor Party [Gurgen ARSENIAN] |
| Aruba | Aliansa/Aruban Social Movement or MSA [Robert WEVER]; Aruban Liberal Organization or OLA [Glenbert CROES]; Aruban Patriotic Movement or MPA [Monica ARENDS-KOCK]; Aruban Patriotic Party or PPA [Benny NISBET]; Aruban People's Party or AVP [Mike EMAN]; People's Electoral Movement Party or MEP [Nelson O. ODUBER]; Real Democracy or PDR [Andin BIKKER]; RED [Rudy LAMPE]; Workers Political Platform or PTT [Gregorio WOLFF] |
| Ashmore and Cartier Islands | void |
| Atlantic Ocean | void |
| Australia | Australian Democrats [Lyn ALLISON]; Australian Greens [Bob BROWN]; Australian Labor Party [Kevin RUDD]; Country Liberal Party [Terry MILLS]; Family First Party [Steve FIELDING]; Liberal Party [Malcolm TURNBULL]; The Nationals [Warren TRUSS] |
| Austria |  Alliance for the Future of Austria or BZOe [Josef BUCHER]; Austrian People's Party or OeVP [Josef PROELL]; Freedom Party of Austria or FPOe [Heinz Christian STRACHE]; Social Democratic Party of Austria or SPOe [Werner FAYMANN]; The Greens [Eva GLAWISCHNIG] |
| Azerbaijan | Azadliq (Freedom) coalition (Popular Front Party, Liberal Party, Citizens' Development Party); Azerbaijan Democratic Party or ADP [Sardar JALALOGLU]; Azerbaijan Democratic Reforms Party (ADRP) Youth Movement [Ramin HAJILI]; Azerbaijan Popular Front or APF, now split in two [Ali KARIMLI, leader of "Reform" APF party; Mirmahmud MIRALI-OGLU, leader of "Classic" APF party]; Azerbaijan Public Forum [Eldar NAMAZOV]; Citizens' Development Party [Ali ALIYEV]; Civil Solidarity Party or CSP [Sabir RUSTAMKHANLY]; Dalga Youth Movement [Vafa JAFAROVA]; Green Party [Mais GULALIYEV and Tarana MAMMADOVA]; Hope (Umid) Party [Iqbal AGAZADE]; Ireli Youth Movement [Jeyhun OSMANLI, Roya TALIBOVA, Farhad MAMMADOV, Elnara GARIBOVA, Elnur MAMMADOV, Ziya ALIYEV]; Justice Party [Ilyas ISMAILOV]; Liberal Party of Azerbaijan [Lala Shovkat HACIYEVA]; Magam Youth Movement [Emin HUSEYNOV]; Motherland Party [Fazail AGAMALI]; Musavat (Equality) [Isa GAMBAR, chairman]; Musavat Party Youth Movement [Elnur MAMMADLI]; National Democratic Party or Grey Wolves (Nationalist, Pan-Turkic) [Iskender HAMIDOV]; Open Society Party [Rasul GULIYEV, in exile in the US]; Party for National Independence of Azerbaijan or PNIA [Ayaz RUSTAMOV]; Popular Front Party Youth Movement [Seymur KHAZIYEV]; Social Democratic Party of Azerbaijan or SDP [Araz ALIZADE and Ayaz MUTALIBOV (in exile)]; Turkish Nationalist Party [Vugar BAYTURAN]; United Azerbaijan Party [Karrar ABILOV]; United Azerbaijan National Unity Party [Hajibaba AZIMOV]; United Party [Tahir KARIMLI]; Yeni (New) Azerbaijan Party [President Ilham ALIYEV]; Yeni Azerbaijan Party Youth Movement [Ramil HASANOV]; Yox (No) Youth Movement [Ali ISMAYILOV] note: opposition parties regularly factionalize and form new parties; |
| Bahamas, The | Free National Movement or FNM [Hubert INGRAHAM]; Progressive Liberal Party or PLP [Perry CHRISTIE] |
| Bahrain | political parties prohibited but political societies were legalized per a July 2005 law |