Football referees
K. Koulik
Koei Koya
Kristina Kozorog
Kaspar Krill
Katalin Kulcsar
Kristo Külljastinen
Kristina Kuzmenko
Kristjan-Eric Lääne
Kyung-Soon Lee
Kirill Levnikov
Kevin Lewis
Katarzyna Lisiecka
Korkie Koketso Mabilu
Kasper Madsen
Khatuna Maisuradze
Kalle Mäkinen
Kabanga Yannick Malala
Karoline Marie Jensen
Kyfer Mayhew
Karl-Hans Meltsas
Kevin Menéndez Lagos
Kridens Meta
Kristián Micheľ
Káprály Mihály
Kristiyan Mladenov Todorov
Karabo Mokau
Kgara Mokoena
Koen Molenaar
Kevin Monteny
Kateryna Monzul
Kevin Morris
Kevin Morrison
Kevin Murray
Khusan Muzaffarov
Khalid Abdulla Nabet
Koki Nagamine
Khalid Najem
Koopal Nazemi
Keisuke Nobori
Kristijan Novosel
Kokou Ognankotan Ntale
Kalle Nummela
Kieran O'Reilly
Kevin O'Sullivan
Kemal Ögen
Konrad Oldhfer
Kevin Ortega
Kadir Özgöde
Konstantinos Panitsidis
Kornel Paszkiewicz