IWSF World Under 21 Champions
| 2003 | Men Slalom | William Asher | GBR |
| 2003 | Women Slalom | Regina Jaquess | USA |
| 2003 | Men Tricks | Jimmy Siemers | USA |
| 2003 | Women Tricks | Regina Jaquess | USA |
| 2003 | Men Jump | Jimmy Siemers | USA |
| 2003 | Women Jump | Kelly Bowen | AUS |
| 2003 | Men Overall | Jimmy Siemers | USA |
| 2003 | Women Overall | Regina Jaquess | USA |
| 2003 | Team | | USA |
| 2005 | Men Slalom | Ian Trapp | USA |
| 2005 | Women Slalom | Regina Jaquess | USA |
| 2005 | Men Tricks | Jason McClintock | CAN |
| 2005 | Women Tricks | Danyelle Bennett | USA |
| 2005 | Men Jump | Kole Magnowski | CAN |
| 2005 | Women Jump | Regina Jaquess | USA |
| 2005 | Men Overall | Jason McClintock | CAN |
| 2005 | Women Overall | Regina Jaquess | USA |
| 2005 | Team | | USA |
| 2007 | Men Slalom | Cale Burdick | USA |
| 2007 | Women Slalom | Nicole Arthur | GBR |
| 2007 | Men Tricks | Adam Pickos | USA |
| 2007 | Women Tricks | Marion Aynaud | FRA |
| 2007 | Men Jump | Zack Worden | USA |
| 2007 | Women Jump | Nancy Chardin | FRA |
| 2007 | Men Overall | Felipe Miranda | CHI |
| 2007 | Women Overall | Whitney Mcclintock | CAN |
| 2007 | Team | | France |
| 2009 | Men Slalom | Jonathan TRAVERS | USA |
| 2009 | Women Slalom | Whitney MCCLINTOCK | CAN |
| 2009 | Men Tricks | Alexandre POTEAU | FRA |
| 2009 | Women Tricks | Whitney MCCLINTOCK | CAN |
| 2009 | Men Jump World | Zack WORDEN | USA |
| 2009 | Women Jump World | Nancy CHARDIN | FRA |
| 2009 | Men Overall | Zack WORDEN | USA |
| 2009 | Women Overall | Whitney MCCLINTOCK | CAN |
| 2009 | Team | | USA |
| 2011 | Men Slalom | Nate SMITH | USA |
| 2011 | Women Slalom | Delfina CUGLIEVAN | PER |
| 2011 | Men Tricks | Alexandre POTEAU | FRA |
| 2011 | Women Tricks | Iris CAMBRAY | FRA |
| 2011 | Men Jump | Timothy BRADSTREET | AUS |
| 2011 | Women Jump | Jacinta CARROLL | AUS |
| 2011 | Men Overall | Timothy BRADSTREET | AUS |
| 2011 | Women Overall | Caroline HENSLEY | USA |
| 2011 | Team | | USA |
| 2013 | Men Slalom | Stephen NEVEU | CAN |
| 2013 | Women Slalom | Brie CARTER | USA |
| 2013 | Men Tricks | Joshua BRIANT | AUS |
| 2013 | Women Tricks | Iris CAMBRAY | FRA |
| 2013 | Men Jump | Daniel EFVERSTROM | SWE |
| 2013 | Women Jump | Jacinta CARROLL | AUS |
| 2013 | Men Overall | Timothy BRADSTREET | AUS |
| 2013 | Women Overall | Jacinta CARROLL | AUS |
| 2013 | Team | | USA |
| 2015 | Men Slalom | Dane MECHLER | USA |
| 2015 | Women Slalom | Taryn GRANT | CAN |
| 2015 | Men Tricks | Joshua BRIANT | AUS |
| 2015 | Women Tricks | Erika LANG | USA |
| 2015 | Men Jump | Taylor GARCIA | USA |
| 2015 | Women Jump | Hanna STRALTSOVA | BLR |
| 2015 | Men Overall | Joshua BRIANT | AUS |
| 2015 | Women Overall | Giannina BONNEMANN | GER |
| 2015 | Team | | USA |
| 2017 | Men Slalom | Taylor GARCIA | USA |
| 2017 | Women Slalom | Allie NICHOLSON | USA |
| 2017 | Men Tricks | Danylo FIL'CHENKO | UKR |
| 2017 | Women Tricks | Anna GAY | USA |
| 2017 | Men Jump | Jack CRITCHLEY | GBR |
| 2017 | Women Jump | Dominique GRONDIN ALLARD | CAN |
| 2017 | Men Overall | Danylo FIL'CHENKO | UKR |
| 2017 | Women Overall | Anna GAY | USA |
| 2017 | Team | | Canada |
| 2019 | Men Slalom | Joel POLAND | GBR |
| 2019 | Women Slalom | Jaimee BULL | CAN |
| 2019 | Men Tricks | Danylo FIL'CHENKO | UKR |
| 2019 | Women Tricks | Anna GAY | USA |
| 2019 | Men Jump | Joel POLAND | GBR |
| 2019 | Women Jump | Valentina GONZALEZ | CHI |
| 2019 | Men Overall | Joel POLAND | GBR |
| 2019 | Women Overall | Anna GAY | USA |
| 2019 | Team | | Great Britain |
| 2021 | Men Slalom | Sean HUNTER | USA |
| 2021 | Women Slalom | Jaimee BULL | CAN |
| 2021 | Men Tricks | Patricio FONT | MEX |
| 2021 | Women Tricks | Neilly ROSS | CAN |
| 2021 | Men Jump | Pol FRIBOURG-DUPLAN | FRA |
| 2021 | Women Jump | Agustina VARAS | CHI |
| 2021 | Men Overall | Olexander SAMOILOV | UKR |
| 2021 | Women Overall | Brooke BALDWIN | USA |
| 2021 | Team | | USA |
| 2023 | Men Slalom | Charlie ROSS | CAN |
| 2023 | Women Slalom | Annemarie WROBLEWSKI | USA |
| 2023 | Men Tricks | Patricio FONT | MEX |
| 2023 | Women Tricks | Kennedy HANSEN | USA |
| 2023 | Men Jump | Tobias GIORGIS | ARG |
| 2023 | Women Jump | Agustina VARAS | CHI |
| 2023 | Men Overall | Martin LABRA | CHI |
| 2023 | Women Overall | Kennedy HANSEN | USA |
| 2023 | Team | | USA |
| 2025 | Men Slalom | Charlie ROSS | CAN |
| 2025 | Women Slalom | Christiana De Osma | PER |
| 2025 | Men Tricks | Jake ABELSON | USA |
| 2025 | Women Tricks | Hannah STOPNICKI | CAN |
| 2025 | Men Jump | Antoine MORIN | FRA |
| 2025 | Women Jump | Kristy APPLETON | AUS |
| 2025 | Men Overall | Tim WILD | GER |
| 2025 | Women Overall | Emma DAVIS | USA |
| 2025 | Team | | USA |
| 2027 | Men Slalom | | |
| 2027 | Women Slalom | | |
| 2027 | Men Tricks | | |
| 2027 | Women Tricks | | |
| 2027 | Men Jump | | |
| 2027 | Women Jump | | |
| 2027 | Men Overall | | |
| 2027 | Women Overall | | |
| 2027 | Team | | |