| Team | Nickname | Intl | Type | Ground |
|---|---|---|---|---|
| Tigres | Men | Unknown | ||
| Men | Unknown | |||
| Men | Chadfields | |||
| Tirol Innsbruck | Men | Unknown | ||
| Men | Ladysmead | |||
| Men | The Beeches | |||
| TG | Men | Unknown | ||
| ✅ | Men | Unknown | ||
| Rovers | Men | The Frank Cooke Complex | ||
| Tolka Rovers (Saturday) | Men | Unknown | ||
| Tombense | Men | Unknown | ||
| Tom Tomsk | Men | Unknown | ||
| Men | Longmead Stadium | |||
| Men | Tooting & Mitcham Community Sports Club | |||
| Torino | Men | Unknown | ||
| Toronto | Men | Tolka Park | ||
| Torpedo | Men | Unknown | ||
| Black and Whites | Men | Unknown | ||
| Torpedo Zhodino | Men | Unknown | ||
| Men | The Mill | |||
| The Gulls | Men | Plainmoor Ground | ||
| Tosno | Men | Unknown | ||
| Spurs | Men | Tottenham Hotspur Stadium | ||
| Spurs | Women | Unknown | ||
| Le Téfécé | Men | Unknown | ||
| Men | Ironworks Road | |||
| Black Sea Storm | Men | Unknown | ||
| Tractor | Men | Unknown | ||
| Men | Shawe View | |||
| The Knights | Men | Unknown | ||
| Tralee Dynamos | Men | Cahermoneen | ||
| Dynamos | Men | No Ground | ||
| Tramore | Men | Graun Park | ||
| Tramore | Men | Tramore Park | ||
| Rovers | Men | Prenton Park | ||
| Men | Unknown | |||
| Men | Unknown | |||
| Transport | Men | Unknown | ||
| Transport | Men | Unknown | ||
| Transylvania | Men | Unknown | ||
| Treaty United | Men | Markets Field | ||
| Treaty | Men | Unknown | ||
| Treaty U14 | Men | Markets Field | ||
| Treaty United U15 | Men | Markets Field | ||
| Treaty United U17 | Men | Markets Field | ||
| Treaty U19 | Men | Markets Field | ||
| Treaty United | Women | Markets Field | ||
| Treaty United WU17 | Women | The Manor Fields | ||
| Treaty | Women | Unknown | ||
| Tre Fiori | Men | Unknown |
