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