| Country | Political parties and leaders |
| Iran | Note: formal political parties are a relatively new phenomenon in Iran and most conservatives still prefer to work through political pressure groups rather than parties; often political parties or coalitions are formed prior to elections and disbanded soon thereafter; a loose pro-reform coalition called the 2nd Khordad Front, which includes political parties as well as less formal groups and organizations, achieved considerable success in elections for the sixth Majles in early 2000; groups in the coalition included the Islamic Iran Participation Front (IIPF), Executives of Construction Party (Kargozaran), Solidarity Party, Islamic Labor Party, Mardom Salari, Mojahedin of the Islamic Revolution Organization (MIRO), and Militant Clerics Society (MCS; Ruhaniyun); the coalition participated in the seventh Majles elections in early 2004 but boycotted them after 80 incumbent reformists were disqualified; following his defeat in the 2005 presidential elections, former MCS Secretary General and sixth Majles Speaker Mehdi KARUBI formed the National Trust Party; a new conservative group, Islamic Iran Developers Coalition (Abadgaran), took a leading position in the new Majles after winning a majority of the seats in February 2004; ahead of the 2008 Majles elections, traditional and hardline conservatives attempted to close ranks under the United Front of Principlists and the Broad Popular Coalition of Principlists; several reformist groups, such as the MIRO and the IIPF, also came together as a reformist coalition in advance of the 2008 Majles elections; the IIPF has repeatedly complained that the overwhelming majority of its candidates were unfairly disqualified from the 2008 elections |
| Iraq | Badr Organization [Hadi al-AMIRI]; Da'wa Party [Prime Minister Nuri al-MALIKI]; Da'wa Tanzim [Hashim al-MUSAWI branch]; Da-wa Tanzim [Abd al-Karim al-ANZI branch]; Fadilah Party [Hasan al-SHAMMARI and Ammar TUAMA]; Goran (Change) List [Nushirwan MUSTAFA]; Hadba Gathering [Athil al-NUJAYFI]; Iraqi Covenant Gathering [Ahmad Abd al-Ghafur al-SAMARRAI]; Iraqi Constitutional Party [Jawad al-BULANI]; Iraqi Front for National Dialogue [Deputy Prime Minister Salih al-MUTLAQ]; Iraqi Islamic Party or IIP [Usama al-TIKRITI]; Iraqi Justice and Reform Movement [Shaykh Abdallah al-YAWR]; Iraqi National Accord or INA [Ayad ALLAWI, former Interim Government prime minister]; Iraqi National Congress or INC [Ahmad CHALABI]; Iraqi National Accord or INA [Ayad ALLAWI]; Islamic Supreme Council of Iraq or ISCI [Ammar al-HAKIM]; Kurdistan Democratic Party or KDP [Kurdistan Regional Government President Masud BARZANI]; Future National Gathering [Finance Minister Rafi al-ISSAWI]; National Iraqiyun Gathering [Usama al-NUJAYFI]; National Movement for Reform and Development [Jamal al-KARBULI]; National Reform Trend [former Prime Minister Ibrahim al-JAFARI]; Patriotic Union of Kurdistan or PUK [President Jalal TALABANI]; Renewal List [Vice President Tariq al-HASHIMI]; Sadrist Trend [Muqtada al-SADR]; Sahawa al-Iraq [Ahmad al-RISHAWI] note: numerous smaller local, tribal, and minority parties |
| Ireland | Fianna Fail [Michael MARTIN]; Fine Gael [Enda KENNY]; Green Party [John GORMLEY]; Labor Party [Eamon GILMORE]; New Vision; Progressive Democrats or PD [Noel GREALISH] (formerly dissolved on 20 November 2009); Sinn Fein [Gerry ADAMS]; Socialist Party [Joe HIGGINS]; The Workers' Party [Michael FINNEGAN]; United Left Alliance |
| Isle of Man | Alliance for Progressive Government; Liberal Vannin Party [Peter KARRAN]; Manx Labor Party; Manx Nationalist Party (Mec Vannin) [Bernard MOFFATT] note: most members sit as independents |
| Israel | Atzmaut (Independence) Party [Ehud BARAK]; Balad [Jamal ZAHALKA]; Democratic Front for Peace and Equality (HADASH) [Muhammad BARAKEH]; Kadima [Tzipora "Tzipi" LIVNI]; Labor Party [Shelly YECHIMOVICH]; Likud [Binyamin NETANYAHU]; National Union [Yaakov KATZ]; SHAS [Eliyahu YISHAI]; The Jewish Home (HaBayit HaYehudi) [Daniel HERSCHKOWITZ]; The New Movement-Meretz [Haim ORON]; United Arab List-Ta'al [Ibrahim SARSUR]; United Torah Judaism or UTJ [Yaakov LITZMAN]; Yisrael Beiteinu or YB [Avigdor LIEBERMAN] |
| Italy | Center-Right: Future and Liberty Party or FLI [Gianfranco FINI]; Lega Nord or LN [Umberto BOSSI]; Movement for Autonomy or MpA [Raffaele LOMBARDO]; People of Freedom or PdL [Silvio BERLUSCONI] Center-Left: Democratic Party or PD [Pier Luigi BERSANI]; Italy of Values or IdV [Antonio DI PIETRO] Centrist parties: Union of the Center or UdC [Pier Ferdinando CASINI] |
| Jamaica | Jamaica Labor Party or JLP [Andrew HOLNESS]; People's National Party or PNP [Portia SIMPSON-MILLER]; National Democratic Movement or NDM [Michael WILLIAMS] |
| Jan Mayen | void |
| Japan | Democratic Party of Japan or DPJ [Yoshihiko NODA]; Japan Communist Party or JCP [Kazuo SHII]; Liberal Democratic Party or LDP [Sadakazu TANIGAKI]; New Komeito or NK [Natsuo YAMAGUCHI]; People's New Party or PNP [Shizuka KAMEI]; Social Democratic Party or SDP [Mizuho FUKUSHIMA]; Your Party or YP [Yoshimi WATANABE] |
| Jersey | two declared parties: Centre Party; Jersey Democratic Alliance note: all senators and deputies elected in 2008 were independents |
| Jordan | Arab Ba'ath Socialist Party [Akram al-HIMSI]; Ba'ath Arab Progressive Party [Fuad DABBOUR]; Call Party [Muhammed ABU BAKR]; Democratic People's Party [Ablah ABU ULBAH]; Democratic Popular Unity Party [Sa'id DIAB]; Islamic Action Front or IAF [Hamzah MANSOUR]; Islamic Center Party [Marwan al-FA'URI]; Jordanian Communist Party [Munir HAMARNAH]; Jordanian National Party [Muna ABU BAKR]; Jordanian United Front [Amjad al-MAJALI]; Life Party [Zahier AMR]; Message Party [Hazem QASHOU]; National Constitution Party [Ahmad al-SHUNAQ]; National Current Party [Abd al-Hadi al-MAJALI]; National Movement for Direct Democracy [Muhammad al-QAQ] |
| Kazakhstan |  Adilet (Justice) [Maksut NARIKBAYEV, Serik ABDRAHMANOV, Bakhytbek AKHMETZHAN, Yerkin ONGARBAYEV, Tolegan SYDYKOV] (formerly Democratic Party of Kazakhstan); Agrarian and Industrial Union of Workers Block or AIST (Agrarian Party and Civic Party); Ak Zhol Party (Bright Path) [Alikhan BAYMENOV]; Alga [Vladimir KOZLOV] (unregistered); Auyl (Village) [Gani KALIYEV]; Azat (Freedom) Party [Bolat ABILOV] (formerly True Ak Zhol Party); Azat NSDP [co-chaired by Bolat ABILOV and Zharmakhan TUYAKBAY]; Azat and NSDP united in 2009, but the authorities have refused to register Azat NSDP as a single party; Communist Party of Kazakhstan or KPK [Serikbolsyn ABDILDIN]; Communist People's Party of Kazakhstan [Vladislav KOSAREV]; National Social Democratic Party or NSDP [Zharmakhan TUYAKBAY]; Nur Otan (Fatherland's Ray of Light) [Nursultan NAZARBAYEV, Nurlan NIGMATULIN] (the Agrarian, Asar, and Civic parties merged with Otan); Patriots' Party [Gani KASYMOV]; Rukhaniyat (Spirituality) [Serikzhan MAMBETALIN] |