The North American Under 21 World Qualifier (usually referred to as the U.S. Under 21 Championship) is an annual speedway event held each year to qualify for a spot in the qualifying round of the World Under 21 Championships since 2003. The current US Champion is Bryce Starks.
The minimum age of a rider to compete is 16 years of age (starting on the date of the rider's birthday). The maximum age is 21 years of age (finishing at the end of the year in which the rider celebrates his 21st birthday).
| width=40px | Year | width=160px | Venue | width=150px | Winners | width=150px | Runner-up | width=150px | 3rd place | |
| 2003 |  Victorville, CA | Eric Carrillo | Bryan Yarrow | Ryan Fisher | ||||||
| 2004 | City of Industry, CA | Justin Boyle | TJ Fowler | Eric Carrillo | ||||||
| 2005 | Victorville, CA | Skyler Greyson | Dario Galvin | Tim Gomez | ||||||
| 2006 | City of Industry, CA | Neil Facchini | Dale Facchini | TJ Fowler | ||||||
| 2007 | Auburn, CA | Ricky Wells[1] | Alex Marcucci | Kenny Ingalls | ||||||
| 2008 | Auburn, CA | Ricky Wells | Kenny Ingalls | Alex Marcucci | ||||||
| 2009 | Auburn, CA | Bryce Starks | Jason Ramirez | Russell Green | ||||||
| Year | Venue | Winners | Runner-up | 3rd place |