| Country | Political parties and leaders |
| San Marino | Communist Refoundation or RC [Ivan FOSHI]; Ideas in Movement or IM [Alessandro ROSSI]; National Alliance or AN [Glauco SANSOVINI]; New Socialist Party [Augusto CASALI]; Party of Socialists and Democrats [Claudio FELICI]; San Marino Christian Democratic Party or PDCS [Pier Marino MENICUCCI]; San Marino Popular Alliance of Democrats or AP [Roberto GIORGETTI]; San Marino Socialist Party or PSS [Alberto CECCHETTI]; Socialists for Reform or SR [Renzo GIARDI]; United Left |
| Sao Tome and Principe | Force for Change Democratic Movement or MDFM [Tome Soares da VERA CRUZ]; Independent Democratic Action or ADI [[Patrice TROVOADA]; Movement for the Liberation of Sao Tome and Principe-Social Democratic Party or MLSTP-PSD [Rafael BRANCO]; New Way Movement or NR; Party for Democratic Convergence or PCD [Delfim NEVES]; Ue-Kedadji coalition; other small parties |
| Saudi Arabia | none |
| Senegal | African Party of Independence [Majhemout DIOP]; And-Jef/African Party for Democracy and Socialism or AJ/PADS [Landing SAVANE]; Alliance of Forces of Progress or AFP [Moustapha NIASSE]; Democratic League-Labor Party Movement or LD-MPT [Dr. Abdoulaye BATHILY]; Front for Socialism and Democracy/Benno Jubel or FSD/BJ [Cheikh Abdoulaye Bamba DIEYE]; Gainde Centrist Bloc or BGC [Jean-Paul DIAS]; Independence and Labor Party or PIT [Amath DANSOKHO]; Jef-Jel [Talla SYLLA]; National Democratic Rally or RND [Madior DIOUF]; People's Labor Party or PTP [Elhadji DIOUF]; Reform Party or PR [Abdourahim AGNE]; Senegalese Democratic Party or PDS [Abdoulaye WADE]; Socialist Party or PS [Ousmane Tanor DIENG]; SOPI Coalition [Abdoulaye WADE] (a coalition led by the PDS); Union for Democratic Renewal or URD [Djibo Leyti KA] |
| Serbia | Coalition of Albanians of the Presevo Valley or KAPD [Riza HALIMI]; Coalition for Sandzak or KZS [Sulejman UGLJANIN]; Democratic Party of Albanians or PDSh [Ragmi MUSTAFA]; Democratic Party of Serbia or DSS [Vojislav KOSTUNICA]; Democratic Party or DS [Boris TADIC]; Democratic Union of the Valley or BDL [Skender DESTANI]; For a European Serbia [Boris TADIC]; Force of Serbia Movement or PSS [Bogoljub KARIC]; G17 Plus [Mladjan DINKIC]; League of Vojvodina Hungarians or SVM [Istvan PASTOR]; Liberal Democratic Party or LDP [Cedomir JOVANOVIC]; Movement for Democratic Progress of LPD [Jonuz MUSLIU]; New Serbia or NS [Velimir ILIC]; Party of Democratic Action or PVD [Riza HALIMI]; Roma Party or RP [Srdjan SAJN]; Serbian Radical Party or SRS [Vojislav SESELJ (currently on trial at The Hague), but Tomislav NIKOLIC is acting leader]; Socialist Party of Serbia or SPS [Ivica DACIC]; Union of Roma of Serbia or URS [Rajko DJURIC] |
| Seychelles | Democratic Party or DP [James MANCHAM, Paul CHOW]; Seychelles National Party or SNP [Wavel RAMKALAWAN] (formerly the United Opposition or UO); Seychelles People's Progressive Front or SPPF [France Albert RENE, James MICHEL] (the governing party) |
| Sierra Leone | All People's Congress or APC [Ernest Bai KOROMA]; Peace and Liberation Party or PLP [Darlington MORRISON]; People's Movement for Democratic Change or PMDC [Charles MARGAI]; Sierra Leone People's Party or SLPP [Solomon BEREWA]; numerous others |
| Singapore | People's Action Party or PAP [LEE Hsien Loong]; Singapore Democratic Alliance or SDA [CHIAM See Tong]; Singapore Democratic Party or SDP [CHEE Soon Juan]; Workers' Party or WP [Sylvia LIM Swee Lian] note: SDA includes Singapore Justice Party or SJP, Singapore National Malay Organization or PKMS, Singapore People's Party or SPP |
| Slovakia | Parties in the Parliament: Christian Democratic Movement or KDH [Pavol HRUSOVSKY]; Direction-Social Democracy or Smer-SD [Robert FICO]; Party of the Hungarian Coalition or SMK [Pal CSAKY]; People's Party - Movement for a Democratic Slovakia or LS-HZDS [Vladimir MECIAR]; Slovak Democratic and Christian Union or SDKU-DS [Mikulas DZURINDA]; Slovak National Party or SNS [Jan SLOTA]; Parties outside the Parliament: Agrarian Party of the Provinces or ASV [Jozef VASKEBA]; Civic Conservative Party or OKS [Peter TATAR]; Free Forum [Zuzana MARTINAKOVA]; Hope or NADEJ [Alexandra NOVOTNA]; Left-wing Bloc or LB [Jozef KALMAN]; Mission 21 - New Christian Democracy or MISIA 21 [Ivan SIMKO]; Movement for Democracy or HZD [Jozef GRAPA]; New Citizens Alliance or ANO [Pavol RUSKO]; Party of the Democratic Left or SDL [Ladislav KOZMON]; Prosperita Slovenska or PS [Frantisek A. ZVRSKOVEC]; Slovak Communist Party or KSS [Vladimir DADO]; Slovak National Coalition or SLNKO [Vitazoslav MORIC]; Slovak People's Party or SLS [Jozef SASIK]; Union of the Workers of Slovakia or ZRS [Jan LUPTAK] |
| Slovenia | Liberal Democracy of Slovenia or LDS [Katarina KRESAL]; New Slovenia or NSi [Andrej BAJUK]; Slovenian Democratic Party or SDS [Janez JANSA]; Democratic Party of Pensioners of Slovenia or DeSUS [Karl ERJAVEC]; Slovene National Party or SNS [Zmago JELINCIC]; Slovene People's Party or SLS [Bojan SROT]; Slovene Youth Party or SMS [Darko KRANJC]; Social Democrats or SD [Borut PAHOR] (formerly ZLSD); ZARES [Gregor Golobic] |
| Solomon Islands | Association of Independent Members or AIM [Thomas CHAN]; Christian Alliance Solomon Islands or CASI [Edward RONIA]; LAFARI Party [John GARO]; National Party [Francis HILLY]; People's Alliance Party or PAP [Sir Allan KEMAKEZA]; Social Credit Party or SOCRED [Manasseh Damukana SOGAVARE]; Solomon First Party [David QUAN]; Solomon Islands Democratic Party [Gabriel SURI]; Solomon Islands Labor Party or SILP [Joses TUHANUKU]; Solomon Islands Liberal Party [Bartholomew ULUFA'ALU]; Solomon Islands Party for Rural Advancement or SIPRA [Job D. TAUSINGA]; United Party [Sir Peter KENILOREA] note: in general, Solomon Islands politics is characterized by fluid coalitions |
| Somalia | none |
| South Africa | African Christian Democratic Party or ACDP [Kenneth MESHOE]; African National Congress or ANC [Jacob ZUMA]; Democratic Alliance or DA [Helen ZILLE]; Freedom Front Plus or FF+ [Pieter MULDER]; Inkatha Freedom Party or IFP [Mangosuthu BUTHELEZI]; New National Party or NNP; Pan-Africanist Congress or PAC [Motsoko PHEKO]; United Democratic Movement or UDM [Bantu HOLOMISA] |
| South Georgia and the South Sandwich Islands | void |
| Southern Ocean | void |
| Spain | Aragonese Party or CHA [Bizen FUSTER]; Basque Nationalist Party or PNV [Inigo URKULLU]; Basque Solidarity or EA [Begona ERRAZTI]; Canarian Coalition or CC [Jose Torres STINGA] (a coalition of five parties); Convergence and Union or CiU [Artur MAS i Gavarro] (a coalition of the Democratic Convergence of Catalonia or CDC [Artur MAS i Gavarro] and the Democratic Union of Catalonia or UDC [Josep Antoni DURAN i LLEIDA]); Entesa Catalonia de Progress (a Senate coalition grouping four Catalan parties - PSC, ERC, ICV, EUA); Galician Nationalist Bloc or BNG [Anxo Manuel QUINTANA Gonzalez]; Initiative for Catalonia Greens or ICV [Joan SAURA i Laporta]; Navarra yes or Na Bai [Uxue BARKOS Berruezo] (a coalition of four Navarran parties); Popular Party or PP [Mariano RAJOY Brey]; Republican Left of Catalonia or ERC [Josep-Lluis CAROD-ROVIRA]; Spanish Socialist Workers Party or PSOE [Jose Luis RODRIGUEZ ZAPATERO]; United Left or IU [Gaspar LLAMAZARES Trigo] (a coalition of parties including the PCE and other small parties) |
| Spratly Islands | void |
| Sri Lanka | All Ceylon Tamil Congress or ACTC [G.PONNAMBALAM]; Ceylon Workers Congress or CWC [Arumugam THONDAMAN]; Communist Party or CP [D. GUNASEKERA]; Eelam People's Democratic Party or EPDP [Douglas DEVANANDA]; Eelam People's Revolutionary Liberation Front or EPRLF [Suresh PREMACHANDRAN]; Janatha Vimukthi Peramuna or JVP [Somawansa AMARASINGHE]; Lanka Sama Samaja Party or LSSP [Tissa VITHARANA]; Mahajana Eksath Peramuna (People's United Front) or MEP [D. GUNAWARDENE]; National Heritage Party or JHU [Ellawala METHANANDA]; National Unity Alliance or NUA [Ferial ASHRAFF]; People's Liberation Organization of Tamil Eelam or PLOTE [D. SIDHARTHAN]; Sri Lanka Freedom Party or SLFP [Mahinda RAJAPAKSA]; Sri Lanka Muslim Congress or SLMC [Rauff HAKEEM]; Tamil Eelam Liberation Organization or TELO [Selvam ADAIKALANATHAN]; Tamil National Alliance or TNA [R. SAMPANTHAN]; Tamil United Liberation Front or TULF [V. ANANDASANGAREE]; United National Party or UNP [Ranil WICKREMASINGHE]; Up-country People's Front or UPF [P. CHANDRASEKARAN] |
| Sudan | National Congress Party or NCP [Umar Hassan al-BASHIR]; Sudan People's Liberation Movement or SPLM [Salva Mayardit KIIR]; and elements of the National Democratic Alliance or NDA including factions of the Democratic Union Party [Muhammad Uthman al-MIRGHANI] and Umma Party [SADIQ Siddiq al-Mahdi]; note - all political parties listed above in the Government of National Unity |
| Suriname | Alternative-1 or A-1 (a coalition of Amazone Party of Suriname or APS [Kenneth VAN GENDEREN], Democrats of the 21st Century or D-21 [Soewarto MOESTADJA], Nieuw Suriname or NS [Radjen Nanan PANDAY], Political Wing of the FAL or PVF [Jiwan SITAL], Trefpunt 2000 or T-2000 [Arti JESSURUN]); General Interior Development Party or ABOP [Ronnie BRUNSWIJK]; National Democratic Party or NDP [Desire BOUTERSE]; New Front for Democracy and Development or NF (a coalition that includes A-Combination or A-Com, Democratic Alternative 1991 or DA-91, an independent, business-oriented party [Winston JESSURUN], National Party Suriname or NPS [Ronald VENETIAAN], United Reform Party or VHP [Ramdien SARDJOE], Pertjaja Luhur or PL [Salam Paul SOMOHARDJO], Surinamese Labor Party or SPA [Siegfried GILDS]); Party for Democracy and Development in Unity or DOE [Marten SCHALKWIJK]; People's Alliance for Progress or VVV (a coalition of Democratic National Platform 2000 or DNP-2000 [Jules WIJDENBOSCH], Grassroots Party for Renewal and Democracy or BVD [Tjan GOBARDHAN], Party for National Unity and Solidarity of the Highest Order or KTPI [Willy SOEMITA], Party for Progression, Justice, and Perseverance or PPRS [Renee KAIMAN], Pendawalima or PL [Raymond SAPOEN]); Progressive Laborers and Farmers Union or PALU [Jim HOK]; Progressive Political Party or PPP [Surinder MUNGRA]; Seeka [Paul ABENA]; Union of Progressive Surinamers or UPS [Sheoradj PANDAY] |
| Svalbard | void |
| Swaziland | the status of political parties, previously banned, is unclear under the new (2006) Constitution and currently being debated - the following are considered political associations; African United Democratic Party or AUDP [Stanley MAUNDZISA, president]; Imbokodvo National Movement or INM; Ngwane National Liberatory Congress or NNLC [Obed DLAMINI, president]; People's United Democratic Movement or PUDEMO [Mario MASUKU, president] |
| Sweden | Center Party [Maud OLOFSSON]; Christian Democratic Party [Goran HAGGLUND]; Environment Party the Greens [no formal leader but party spokespersons are Maria WETTERSTRAND and Peter ERIKSSON]; Left Party or V (formerly Communist) [Lars OHLY]; Liberal People's Party [Jan BJORKLUND]; Moderate Party (conservative) [Fredrik REINFELDT]; Social Democratic Party [Mona SAHLIN] |
| Switzerland | Green Party (Gruene Partei der Schweiz or Gruene, Parti Ecologiste Suisse or Les Verts, Partito Ecologista Svizzero or I Verdi, Partida Ecologica Svizra or La Verda) [Ruth GENNER]; Christian Democratic People's Party (Christlichdemokratische Volkspartei der Schweiz or CVP, Parti Democrate-Chretien Suisse or PDC, Partito Democratico-Cristiano Popolare Svizzero or PDC, Partida Cristiandemocratica dalla Svizra or PCD) [Christophe DARBELLAY]; Radical Free Democratic Party (Freisinnig-Demokratische Partei der Schweiz or FDP, Parti Radical-Democratique Suisse or PRD, Partitio Liberal-Radicale Svizzero or PLR) [Fulvio PELLI]; Social Democratic Party (Sozialdemokratische Partei der Schweiz or SPS, Parti Socialist Suisse or PSS, Partito Socialista Svizzero or PSS, Partida Socialdemocratica de la Svizra or PSS) [Hans-Juerg FEHR]; Swiss People's Party (Schweizerische Volkspartei or SVP, Union Democratique du Centre or UDC, Unione Democratica de Centro or UDC, Uniun Democratica dal Center or UDC) [Ueli MAURER]; and other minor parties |
| Syria | legal parties: National Progressive Front or NPF [President Bashar al-ASAD, Dr. Suleiman QADDAH] (includes Arab Socialist Renaissance (Ba'th) Party [President Bashar al-ASAD]; Socialist Unionist Democratic Party [Fadlallah Nasr Al-DIN]; Syrian Arab Socialist Union or ASU [Safwan QUDSI]; Syrian Communist Party (two branches) [Wissal Farha BAKDASH, Yusuf Rashid FAYSAL]; Syrian Social Nationalist Party [Ali QANSU]; Unionist Socialist Party [Fayez ISMAIL]) opposition parties not legally recognized:: Arab Democratic Socialist Union Party [Hasan Abdul AZIM]; Arab Socialist Movement; Democratic Ba'th Party [Ibrahim MAHKOS]; People's Democratic Party [Riad al TURK]; Revolutionary Workers' Party [Abdul Hafeez al HAFEZ] Kurdish parties (considered illegal): Kurdish Democratic Front [Abdul Hamid DARWISH] (includes four parties); Kurdish Coordination [Abdul Hakim BASHAR] (includes Azadi Party [Kheirudin MURAD], Future Party [Masha'l TAMMO], Yekity Party [Hasam SALE]) other parties: Nahda Party [Abdul Aziz al MISLET]; Syrian Democratic Party [Mustafa QALAAJI] |