SI Member Parties in Government
| Albania | Socialist Party of Albania, SPA | Lead coalition |
| Angola | MPLA | President and government |
| Belgium | Socialist Party, PS | Coalition |
| Botswana | Botswana Democratic Party, BDP | President and government |
| Bulgaria | Bulgarian Socialist Party, BSP | Coalition |
| Burkina Faso | People's Movement for Progress, MPP | President and government |
| Cabo Verde | African Party of Cabo Verde's Independence, PAICV | President |
| Chad | National Union for Development and Renewal, UNDR | Coalition |
| Chile | Party for Democracy, PPD | Coalition |
| Chile | Radical Party, PR | Coalition |
| Chile | Socialist Party of Chile, PS | Coalition |
| Democratic Republic of Congo | Union for Democracy and Social Progress, UDPS | President |
| Finland | Finnish Social Democratic Party, SDP | Coalition |
| Haiti | Union of Haitian Social Democrats, Fusion SD | Coalition |
| Iraq | Patriotic Union of Kurdistan, PUK | President & coalition |
| Israel | Israel Labour Party | Coalition |
| Israel | Meretz Party | Coalition |
| Kosovo | Movement for Self Determination, Vetëvendosje | Majority government |
| Luxembourg | Luxembourg Socialist Workers' Party, LSAP/POSL | Coalition |
| Mongolia | Mongolian People’s Party, MPP | Majority |
| Montenegro | Democratic Party of Socialists of Montenegro, DPS | President |
| Montenegro | Social Democratic Party of Montenegro, SDP | Coalition |
| Mozambique | Frelimo | President and government |
| Namibia | SWAPO | President and government |
| Nepal | Nepali Congress Party | Coalition |
| Niger | Party for Democracy and Socialism of Niger, PNDS | President and government |
| Pakistan | Pakistan People's Party, PPP | Coalition |
| Palestine | Fatah | President |
| Panama | Democratic Revolutionary Party, PRD | President and government |
| Portugal | Socialist Party, PS | Minority government with majority support |
| San Marino | Party of Socialists and Democrats, PSD | Coalition |
| São Tomé and Príncipe | Movement for the Liberation of São Tomé and Príncipe/Social Democratic Party | Coalition |
| Serbia | Social Democratic Party of Serbia, SDPS | Coalition |
| Spain | Spanish Socialist Workers' Party, PSOE | Minority government with majority support |
| South Africa | African National Congress, ANC | President and government |
