| | | Men | Tolka Park |
| | | Men | Stadio Briamasco |
|
None
| | Men | Stadio Fonte dell'Ovo |
|
Celtic
| | Men | Unknown |
| | | Men | Grass Roots Stadium |
|
Trinidad and Tobago
| ✅ | Men | Unknown |
|
Trojans
| | Men | Unknown |
| | | Men | Unknown |
|
The Tinners
| | Men | Unknown |
| | | Men | Unknown |
|
Die Kraichgauer
| | Women | Unknown |
|
TSS FC Rovers
| | Women | Unknown |
| | | Men | Glevum Park |
|
Tullamore
| | Men | Leah Victoria Park |
| | | Men | Culverden Stadium |
|
Tunisia
| ✅ | Men | Unknown |
|
Türkiye
| ✅ | Men | Tolka Park |
| | ✅ | Men | Tolka Park |
|
Türkiye U21
| ✅ | Men | Unknown |
|
Türkiye Women
| ✅ | Women | Tolka Park |
|
Turkgucu
| | Men | Unknown |
|
The Crescent Stars
| ✅ | Men | Unknown |
|
Türkiye U19
| ✅ | Men | Unknown |
|
Türkiye U19 W
| ✅ | Women | Unknown |
|
Türkiye Women U17
| ✅ | Women | Unknown |
|
Tuscan Select XI
| | Men | The Showgrounds |
| | | Men | Unknown |
|
Tuzlaspor
| | Men | Stadionul Dacia |
|
Twente
| | Women | Tolka Park |
|
Two-Mile Borris
| | Men | Unknown |
|
Txantrea
| | Men | Unknown |
|
U. Catolica
| | Men | Unknown |
|
UCC
| | Men | The Farm |
|
UCC United
| | Men | Unknown |
|
The Students
| | Men | The UCD Bowl |
|
The Students
| | Men | The UCD Bowl |
|
The Students
| | Men | Unknown |
|
The Students
| | Men | Unknown |
|
UCD
| | Men | Unknown |
|
UCD U14
| | Men | Unknown |
|
Students
| | Men | The Showgrounds |
|
The Students
| | Men | The UCD Bowl |
|
Students
| | Men | The UCD Bowl |
| | | Men | The Oaks |
|
Udinese
| | Men | Unknown |
|
UDL
| | Men | Estadio Las Gaunas |
|
UE Engordany
| | Men | Unknown |
|
Figueres
| | Men | Vilatenim |
|
Squirrels
| | Men | Unknown |
|
Santju
| | Men | Unknown |
