| Übeyd Adiyaman | Turkey U17 |  Turquía | Portero |
| Ubilava, Daviti | Georgia U19 |  Georgia | Centrocampista |
| Ubiparip, Vojo | Lech (POL) |  Serbia | Delantero |
| Uche, Kalu | Kasımpaşa (TUR) |  Nigeria | Centrocampista |
| Uchida, Atsuto | Schalke (GER) |  Japón | Defensa |
| Ude, Liis | Pärnu (EST) |  Estonia | Delantero |
| Udovaliev, Ilčo | Zelezarec (MKD) / FYROM FUT |  ARYM | Portero |
| Udsen, Daniel | BGA (DEN) / Faroe Islands |  Islas Feroe | Centrocampista |
| Ufuk Ceylan | Galatasaray (TUR) | Turquía | Portero |
| Uğur İnceman | Antalyaspor (TUR) | Turquía | Centrocampista |
| Uğur Kavuk | Sivasspor (TUR) | Turquía | Defensa |
| Uğur Uçar | Karabükspor (TUR) | Turquía | Defensa |
| Ujfaluši, Tomáš | Galatasaray (TUR) |  República Checa | Defensa |
| Ujkani, Samir | Chievo (ITA) / Albania |  Albania | Portero |
| Ukra | Rio Ave (POR) |  Portugal | Delantero |
| Ulanov, Aleksandr | Kairat (KAZ) |  Kazajstán | Portero |
| Ulasevich, Ekaterina | Rossiyanka (RUS) |  Rusia | Portero |
| Ulbin, Karmen | Slovenia WU19 |  Eslovenia | Defensa |
| Uleksin, Jessika | Estonia WU17 | Estonia | Defensa |
| Ulfik, Tomasz | Poland FUT |  Polonia | Portero |
| Ülkay Kollu | Turkey WU17 | Turquía | Portero |
| Ulmer, Andreas | Salzburg (AUT) |  Austria | Defensa |
| Ulreich, Sven | Stuttgart (GER) |  Alemania | Portero |
| Ulusoy, Kazim Onur | Hamburg (GER) | Alemania | Centrocampista |
| Ulusoy, Ali | Netherlands U17 |  Holanda | Defensa |
| Ulvestad, Fredrik | Norway U21 |  Noruega | Centrocampista |
| Umarov, Osman | Qarabağ (AZE) / Azerbaijan U21 |  Azerbaiyán | Portero |
| Umarov, Rizvan | Azerbaijan U21 | Azerbaiyán | Delantero |
| Umbides, Javier | Orduspor (TUR) |  Argentina | Centrocampista |
| Ümran Özev | Turkey WU19 | Turquía | Centrocampista |
| Umtiti, Samuel | Lyon (FRA) |  Francia | Defensa |
| Umut Bulut | Galatasaray (TUR) / Turkey | Turquía | Delantero |
| Umut Kaya | Beşiktaş (TUR) / Turkey U21 | Turquía | Portero |
| Umut Sözen | Karabükspor (TUR) / Turkey U21 | Turquía | Centrocampista |
| Ünal, Gökhan | Karabükspor (TUR) | Turquía | Delantero |
| Unitt, Rachel | Birmingham (ENG) / England WOCO |  Inglaterra | Defensa |
| Ünlü, Tolgahan | Liechtenstein U21 |  Liechtenstein | |
| Unnerstall, Lars | Schalke (GER) / Germany U21 | Alemania | Portero |
| Ünsal, Berk Ismail | Turkey U19 | Turquía | Delantero |
| Unzue Urdaniz, Marta | Barcelona (ESP) |  España | Defensa |
| Upesjure, Dita | Latvia WOCO |  Letonia | Defensa |
| Upmalis , Valdis | Latvia U19 | Letonia | Defensa |
| Urazaeva, Elvira | Zorka-BDU (BLR) / Belarus WOCO |  Bielorrusia | Delantero |
| Urba, Gytis | Lithuania U21 |  Lituania | Defensa |
| Urbaitis, Karolis | Lithuania U21 | Lituania | Defensa |
| Urban, Rudolf | Piast (POL) |  Eslovaquia | Centrocampista |
| Urbán, Fanni | Hungary WU19 |  Hungría | Defensa |
| Urbanic, Tómas | Iceland U17 |  Islandia | Centrocampista |
| Urbelionis, Darius | Nautara Kaunas (LTU) / Lithuania FUT | Lituania | Defensa |
| Urbelis, Rokas | Lithuania U21 | Lituania | Delantero |
