Az AMA Motocross Championship az Egyesült Államok motocross bajnoksága . Az American Motorcyclist Association (AMA) irányítása alatt ez következik az amerikai szezonban az AMA Supercross bajnokságon. Ennek az utóbbi eseménynek az Egyesült Államokban való nagy népszerűsége miatt sok szponzor van jelen, amely magasabb fizetést kínál a versenyzőknek, mint amit a motokrossz világbajnokságon gyakorolnak . A mezőny fontos, és sok pilóta gyorsan csatlakozik az amerikai pályához.
| Év | 250 cm 3 / Motocross | 125 cm 3 / Lites | 500 cm 3 |
|---|---|---|---|
| 1972 | Gary Jones ( Yamaha ) | Brad Lackey ( Kawasaki ) | |
| 1973 | Gary Jones ( Honda ) | Pierre Karsmakers ( Yamaha ) | |
| 1974 | Gary Jones ( Can-Am ) | Marty Smith ( Honda ) | Jimmy Weinert ( Kawasaki ) |
| 1975 | Tony DiStefano ( Suzuki ) | Marty Smith ( Honda ) | Jimmy Weinert ( Kawasaki ) |
| 1976 | Tony DiStefano ( Suzuki ) | Bob Hannah ( Yamaha ) | Kent Howerton ( Husqvarna ) |
| 1977 | Tony DiStefano ( Suzuki ) | Broc Glover ( Yamaha ) | Marty Smith ( Honda ) |
| 1978 | Bob Hannah ( Yamaha ) | Broc Glover ( Yamaha ) | Rick Burgett ( Yamaha ) |
| 1979 | Bob Hannah ( Yamaha ) | Broc Glover ( Yamaha ) | Danny LaPorte ( Suzuki ) |
| 1980 | Kent Howerton ( Suzuki ) | Mark Barnett ( Suzuki ) | Chuck Sun ( Honda ) |
| tizenkilenc nyolcvan egy | Kent Howerton ( Suzuki ) | Mark Barnett ( Suzuki ) | Broc Glover ( Yamaha ) |
| 1982 | Donnie Hansen ( Honda ) | Mark Barnett ( Suzuki ) | Darrell Schultz ( Honda ) |
| 1983 | David Bailey ( Honda ) | Johnny O'Mara ( Honda ) | Broc Glover ( Yamaha ) |
| 1984 | Rick Johnson ( Honda ) | Jeff Ward ( Kawasaki ) | David Bailey ( Honda ) |
| 1985 | Jeff Ward ( Kawasaki ) | Ron Lechien ( Honda ) | Broc Glover ( Yamaha ) |
| 1986 | Rick Johnson ( Honda ) | Micky Dymond ( Honda ) | David Bailey ( Honda ) |
| 1987 | Rick Johnson ( Honda ) | Micky Dymond ( Honda ) | Rick Johnson ( Honda ) |
| 1988 | Jeff Ward ( Kawasaki ) | George Holland ( Honda ) | Rick Johnson ( Honda ) |
| 1989 | Jeff Stanton ( Honda ) | Mike Kiedrowski ( Honda ) | Jeff Ward ( Kawasaki ) |
| 1990 | Jeff Stanton ( Honda ) | Guy Cooper ( Suzuki ) | Jeff Ward ( Kawasaki ) |
| 1991 | Jean-Michel Bayle ( Honda ) | Mike Kiedrowski ( Kawasaki ) | Jean-Michel Bayle ( Honda ) |
| 1992 | Jeff Stanton ( Honda ) | Jeff Emig ( Yamaha ) | Mike Kiedrowski ( Kawasaki ) |
| 1993 | Mike Kiedrowski ( Kawasaki ) | Doug Henry ( Honda ) | Mike LaRocco ( Kawasaki ) |
| 1994 | Mike LaRocco ( Kawasaki ) | Doug Henry ( Honda ) | |
| 1995 | Jeremy McGrath ( Honda ) | Steve Lamson ( Honda ) | |
| 1996 | Jeff Emig ( Kawasaki ) | Steve Lamson ( Honda ) | |
| 1997 | Jeff Emig ( Kawasaki ) | Ricky Carmichael ( Kawasaki ) | |
| 1998 | Doug Henry ( Yamaha ) | Ricky Carmichael ( Kawasaki ) | |
| 1999 | Greg Albertyn ( Suzuki ) | Ricky Carmichael ( Kawasaki ) | |
| 2000 | Ricky Carmichael ( Kawasaki ) | Travis Pastrana ( Suzuki ) | |
| 2001 | Ricky Carmichael ( Kawasaki ) | Mike Brown ( Kawasaki ) | |
| 2002 | Ricky Carmichael ( Honda ) | James Stewart Jr ( Kawasaki ) | |
| 2003 | Ricky Carmichael ( Honda ) | Grant Langston ( KTM ) | |
| 2004 | Ricky Carmichael ( Honda ) | James Stewart Jr ( Kawasaki ) | |
| 2005 | Ricky Carmichael ( Suzuki ) | Ivan Tedesco ( Kawasaki ) | |
| 2006 | Ricky Carmichael ( Suzuki ) | Ryan Villopoto ( Kawasaki ) | |
| 2007 | Grant Langston ( Yamaha ) | Ryan Villopoto ( Kawasaki ) | |
| 2008 | James Stewart Jr ( Kawasaki ) | Ryan Villopoto ( Kawasaki ) | |
| 2009 | Csád Reed ( Suzuki ) | Ryan Dungey ( Suzuki ) | |
| 2010 | Ryan Dungey ( Suzuki ) | Trey Canard ( Honda ) | |
| 2011 | Ryan Villopoto ( Kawasaki ) | Dean Wilson ( Kawasaki ) | |
| 2012 | Ryan Dungey ( KTM ) | Blake Baggett ( Kawasaki ) | |
| 2013 | Ryan Villopoto ( Kawasaki ) | Eli Tomac ( Honda ) | |
| 2014 | Ken Roczen ( KTM ) | Jeremy Martin ( Yamaha ) | |
| 2015 | Ryan Dungey ( KTM ) | Jeremy Martin ( Yamaha ) | |
| 2016 | Ken Roczen ( Suzuki ) | Cooper Webb ( Yamaha ) | |
| 2017 | Eli Tomac ( Kawasaki ) | Zach Osborne ( Husqvarna ) | |
| 2018 | Eli Tomac ( Kawasaki ) | Aaron Plessinger ( Yamaha ) | |
| 2019 | Eli Tomac ( Kawasaki ) | Adam Cianciarulo ( Kawasaki ) | |
| 2020 | Zach Osborne ( Husqvarna ) | Dylan Ferrandis ( Yamaha ) |