David Guillen Vargas
- Country:Costa Rica
- Born:20 March 1996 (24 years)
Former Junior Pan American Championships silver medallist David Guillen Vargas of Costa Rica made his World Championships bow in 2017. The youngster started with a win as he beat Alfred Linguni (MAW) with an ippon-seoi-nage after just 10 seconds before suffering a defeat against Csoknyai Laszlo (HUN). Guillen Vargas won two contests at the Düsseldorf Grand Slam including the dismissal of Achraf Moutii (MAR) with a ura-nage.