Words by letter S
- Solana, Javier (1942 - )
- Solbes Mira, Pedro (1942 - )
- Solemn Declaration on European Union
- Solidarity clause
- Solidarity Fund
- SOS-Democracy
- Sovereignty
- Spaak, Paul-Henri (1899 - 1972)
- Space
- Spain
- Spinelli, Altiero (1907 - 1986)
- Sport
- Stabilisation and Association Process, SAP
- Stability and Growth Pact
- Stability Pact for South-Eastern Europe