| FIM Motocross Junior World Championship | |
| Country/Region: | International |
| Inaugural: | 2004 |
| Champion Rider: | 125cc -  Noel Zanocz85cc -  Levi Townley65cc - Kash van Hamond |
| Constructor: | 125cc -  Fantic85cc -  Yamaha65cc -  Gas Gas |
| Current Season: | 2024 FIM Motocross Junior World Championship season |
The FIM Motocross Junior World Championship is a motorcross championship for younger riders, inaugurated in 2004, and is a feeder series to the FIM Motocross World Championship.
| Season | Location | 125cc | Constructor | 85cc | Constructor | 65cc | Constructor | |
|---|---|---|---|---|---|---|---|---|
| 2004 | Kegums | Ivo Šteinbergs | Yamaha |  Zachary Osborne | KTM | |||
| 2005 |  Jinín |  Dennis Verbruggen | Yamaha |  Steven Clarke | Suzuki | |||
| 2006 |  Vantaa | Joel Roelants | KTM | Alessandro Lupino | KTM | |||
| 2007 | Sevlievo | Blake Wharton | KTM |  Ken Roczen | Suzuki | |||
| 2008 | Heerde | Matīss Karro | Suzuki | Jeffrey Herlings | Suzuki | |||
| 2009 | Taupō | Eli Tomac | Honda |  Jay Wilson | KTM | |||
| 2010 |  Dardon-Gueugnon | Jordi Tixier | KTM | Henri Jacobi | KTM | Jake Pinhancos | KTM | |
| 2011 | Cingoli | Joseph Savatgy | Suzuki | Pauls Jonass | KTM |  Jorge Prado García | KTM | |
| 2012 | Sevlievo | Tim Gajser | KTM | Brian Hsu | Suzuki | Caleb Grothues | KTM | |
| 2013 | Jinín | Pauls Jonass | KTM | Conrad Mewse | KTM | Aiden Tijero | KTM | |
| 2014 | Lierneux | Brian Hsu | Suzuki | Kim Savaste | KTM | Jett Lawrence | KTM | |
| 2015 | El Molar | Maxime Renaux | Yamaha | Raivo Dankers | KTM | Kay Karssemakers | KTM | |
| 2016 |  Orlyonok | Jago Geerts | KTM | Rene Hofer | KTM | Kirill Vorobyev | KTM | |
| 2017 |  Lange | Gianluca Facchetti | Husqvarna | Eddie Wade | Husqvarna | Ivano van Erp | KTM | |
| 2018 | Horsham | Bailey Malkiewicz | Yamaha | Caden Braswell | KTM | Braden Plath | Husqvarna | |
| 2019 | Mattia Guadagnini | Husqvarna | Valerio Lata | KTM | Vitezslav Marek | KTM | ||
| 2021 |  Håkon Østerhagen | Fantic | Mattia Barbieri | Gas Gas | Aron Katona | Husqvarna | ||
| 2022 | Ivano van Erp | Yamaha | Gyan Doensen | Husqvarna | Lucas Leok | Husqvarna | ||
| 2023 | Mathis Valin | Gas Gas | Dani Heitink | Husqvarna | Patriks Cirulis | Husqvarna | ||
| 2024 | Noel Zanocz | Fantic | Levi Townley | Yamaha | Kash van Hamond | Gas Gas |