Football referees
Aaron Wyn Jones
Anne-Marie Joseph
Aurélien Juenkou
Andrew Juma
Atte Jussila
Alhaji Musa Kabia
Anton Kachanov
Almir Kadiric
Atsushi Kamimura
Anojen Kanagasingam
Alim Kandemir
Antti Kanerva
Ashwin Mohanlal Kanojia
Abdoul Kanoso
Atilla Karaoğlan
Ali Karatutlu
Andrei Karhu
Abdulsalam Kassim
Artem Kataykin
Alexandros Katsikogiannis
Adnan Deniz Kayatepe
Anna-Marie Keighley
Alexandre Keita
Alan Kelly
Artis Ķēniņš
Aleksi Keronen
Adam Kersey
Ahmed Mohamed Khalil Saad
Abbas Khan
Artem Kharin
A. Kherradji
Andriy Kholyavko
Abdurashid Khudoyberganov
Alan Kijas
A. King
Alex King
Alexander King
Andrew Kitchen
Aviv Klein
Aleksandr Klemenov
Artem Klyuev
A. Koçak
Andi Koçi
Andre Kolissala Mbangui
Aleksandr Kolochinskiy
Aleksey Koltunov
Aleksandr Kopat
Adem Korkmaz
Andriy Koshura
Alena Kotsur