Football referees
Karo Hovhannisian
Kevin Howick
Kristi Hoxha
Karel Hrubes
Kavan Hurn
Koei Hut
Kári Jóannesarson á Høvdanum
Katia Itzel García
Karol Iwanowicz
Kate Jacewicz
Krzysztof Jakubik
Kalilou Jarju
Keiner José Jiménez Salas
Kevin Johnson
Kyle Johnston
Kontinen Joona
Kim Junna
Kevin Kaivoja
Kaan Kara
Kazuyoshi Karashima
Kristoffer Karlsson
Konstantinos Katoikos
Kristjan Kattus
Karl Kena
Keith Kennedy
Konrad Kiełczewski
Ki-Hyun Kim
Kentaro Kobayashi
Klajdi Kola
Kristiyan Kolev
Katikos Konstantinos
Konstantinos Konstantios
Karl Koppel
Katja Koroleva
Konstantinos Kotsanis
Koei Koya
Kristina Kozorog
Kaspar Krill
Katalin Kulcsar
Kristo Külljastinen
Kristina Kuzmenko
Kristjan-Eric Lääne
Kyung-Soon Lee
Kirill Levnikov
Katarzyna Lisiecka
Korkie Koketso Mabilu
Kasper Madsen
Khatuna Maisuradze
Kalle Mäkinen
Kabanga Yannick Malala