| Keko | Catania (ITA) |  Spain | Midfield |
| Keković, Milica | Montenegro WU17 |  Montenegro | Goalkeeper |
| Kelava, Ivan | Croatia |  Croatia | Goalkeeper |
| Kelemen, Marián | Śląsk (POL) |  Slovakia | Goalkeeper |
| Kelemenová, Nina | Slovakia WU17 | Slovakia | Midfield |
| Kelhar, Dejan | Qäbälä (AZE) / Slovenia |  Slovenia | Defender |
| Kelić, Renato | Croatia U21 | Croatia | Defender |
| Kelleci, Tufan | Gaziantepspor (TUR) |  Turkey | Defender |
| Kelleher, Megan | Republic of Ireland WU17 |  Republic of Ireland | Midfield |
| Keller, Christian T | Randers (DEN) |  Denmark | Forward |
| Keller, Marina | Zürich (SUI) / Switzerland WOCO |  Switzerland | Defender |
| Keller, Lara | Switzerland WOCO | Switzerland | Midfield |
| Kelly, Stephen | Reading (ENG) / Republic of Ireland | Republic of Ireland | Defender |
| Kelly, Martin | Liverpool (ENG) / England U21 |  England | Defender |
| Kelly, Liam | Bristol City (ENG) / Scotland U21 |  Scotland | Midfield |
| Kelly, Emma Rose | England WU17 | England | Forward |
| Kelly, Samantha | Northern Ireland WU17 |  Northern Ireland | Midfield |
| Kelly, Liam | Scotland U17 | Scotland | Goalkeeper |
| Kelmendi, Labinot | Brommapojkarna (SWE) |  Sweden | Midfield |
| Kelvin | Porto (POR) |  Brazil | Forward |
| Kemal Mert Özyiğit | Turkey U19 | Turkey | Goalkeeper |
| Kemen, Olivier | France U17 |  France | Midfield |
| Kemme, Tabea | Potsdam (GER) / Germany WOCO |  Germany | Defender |
| Kempf, Marc Oliver | Eintracht Frankfurt (GER) | Germany | Defender |
| Kemppi, Juliette | Finland WU19 |  Finland | Forward |
| Kenan Karaman | Turkey U19 | Turkey | Forward |
| Kenan Köseoğlu | Eindhoven (NED) / Turkey FUT | Turkey | Forward |
| Kenan Özer | Akhisar (TUR) | Turkey | Forward |
| Kenda, Tatiana | Belarus WOCO |  Belarus | Midfield |
| Kende, Omri | Astra (ROU) |  Israel | Defender |
| Kendysh, Yuri | Partizan Minsk (BLR) / Belarus U21 | Belarus | Midfield |
| Kenia, Levan | Karpaty (UKR) / Georgia U21 / Georgia |  Georgia | Midfield |
| Kennedy, Matthew | Everton (ENG) / Scotland U19 | Scotland | Forward |
| Kennedy, Mikhail | Northern Ireland U17 | Northern Ireland | Forward |
| Kenzhebayev, Nurym | Kazakhstan FUT |  Kazakhstan | Forward |
| Keogh, Andrew | Millwall (ENG) / Republic of Ireland | Republic of Ireland | Forward |
| Kërçiku, Dorian | Albania U21 |  Albania | Midfield |
| Kerdzevadze, Ilia | Georgia U17 | Georgia | Forward |
| Kerem, Seras | Kasımpaşa (TUR) | Turkey | Midfield |
| Keren, Dana | ASA Tel-Aviv (ISR) | Israel | Defender |
| Kerger, Kevin | Luxembourg U19 |  Luxembourg | Forward |
| Kerim Zengin | Gençlerbirliği (TUR) | Turkey | Forward |
| Kerk, Sebastian | Germany U19 | Germany | Midfield |
| Kerpiėnė, Gitana | Gintra (LTU) / Lithuania WOCO |  Lithuania | Midfield |
| Kerr, Mark | Dundee (SCO) | Scotland | Midfield |
| Kerr, Fraser | Motherwell (SCO) | Scotland | Defender |
| Kerschbaum, Roman | Austria U19 |  Austria | Midfield |
| Kerschowski, Isabel | Potsdam (GER) / Germany WOCO | Germany | Forward |
| Keršulis, Tomas | Lithuania U17 | Lithuania | Midfield |
| Keryakoplis, Hannah | Wales WOCO |  Wales | Forward |
