| Team | Nickname | Intl | Type | Ground |
|---|---|---|---|---|
| Town | Men | Unknown | ||
| Men | The Tannery Ground | |||
| Strogino Moscow | Men | Unknown | ||
| Godset | Men | Unknown | ||
| Men | Unknown | |||
| Men | The Beehive | |||
| Sturm | Men | Tolka Park | ||
| Sturm Graz | Men | Tolka Park | ||
| St Vincent's Hospital | Men | Unknown | ||
| Falcons of Jediane | ✅ | Men | Unknown | |
| Sudet | Men | Unknown | ||
| Men | Stadio Marco Druso | |||
| Suvalkieciai | Men | Unknown | ||
| Men | Unknown | |||
| Suncroft | Men | Unknown | ||
| Sunderland | Men | Stadium of Light | ||
| Men | Sunderland LGV Park | |||
| Sunderland Ladies | Women | Unknown | ||
| Sure Sports | Men | Unknown | ||
| The Blues | Men | Unknown | ||
| Men | London Hire Stadium | |||
| Men | Central Ground | |||
| Men | VBS Community Stadium | |||
| Sutton United | Men | VBS Community Stadium | ||
| Blue Wings | Men | Unknown | ||
| Die Lilien | Men | Unknown | ||
| Die Blauen | Men | Unknown | ||
| Bleiburg | Men | Unknown | ||
| Horn | Men | Unknown | ||
| SVV | Men | Stadion Harga | ||
| TEC | Men | Unknown | ||
| Wehen Wiesbaden | Men | Unknown | ||
| The Swans | Men | Swansea.com Stadium | ||
| Sweden | ✅ | Men | Rasunda Stadium | |
| Swedes | ✅ | Men | No Ground | |
| ✅ | Men | Unknown | ||
| Sweden | ✅ | Men | Unknown | |
| Sweden | ✅ | Women | Unknown | |
| Sweden Women U17 | ✅ | Women | Unknown | |
| Sweden | ✅ | Women | Unknown | |
| Men | Unknown | |||
| Swilly | Men | Swilly Park | ||
| Men | The Webbs Wood Stadium | |||
| The Robins | Men | The County Ground | ||
| Swinford FC | Men | No Ground | ||
| Rossocrociati | ✅ | Men | Unknown | |
| Swiss | ✅ | Men | No Ground | |
| Switzerland U19 | ✅ | Men | Unknown | |
| Swiss | ✅ | Men | Unknown | |
| Switzerland | ✅ | Women | No Ground |
