Ko Janssens

{{short description|Dutch boxer}}

Jacobus Cornelius "Ko" Janssens (20 December 1889, Rotterdam - 21 August 1970, Epe[https://web.archive.org/web/20200418084037/https://www.sports-reference.com/olympics/athletes/ja/ko-janssens-1.html Ko Janssens at Sports Reference]) was a Dutch boxer who competed in the 1920 Summer Olympics. In 1920 he was eliminated in the first round of the lightweight class after losing his fight to Frank Cassidy.{{cite web|url=https://www.olympedia.org/athletes/4709 |title=Ko Janssens |work=Olympedia |access-date=5 August 2021}}