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West Region Tournament (2001-2021)
| Year | Result |
| 2024 | Central East Maui (Wailuku, Hawaii) 9, Eastvale (Southern California) 1 |
| 2023 | El Segundo (Southern California) 3, Bollinger Canyon (San Ramon, Northern California) 1 |
| 2022 | Honolulu (Hawaii) 9, Sidewinder (Peoria, Arizona) 2 |
| 2021 | Honolulu (Hawaii) 7, Torrance (Southern California) 2 |
| 2020 | International tournament not held due to Covid-19 pandemic |
| 2019 | Central East Maui (Wailuku, Hawaii) 4, Sunnyside (Tucson, Arizona) 1 |
| 2018 | Honolulu (Hawaii) 11, Tri-City (Rocklin, Northern California) 2 |
| 2017 | Santa Margarita National (Rancho Santa Margarita, Southern California) 11, Dixie (St. George, Utah) 7 |
| 2016 | Park View (Chula Vista, Southern California) 1, Mountain Ridge (Las Vegas, Nevada) 0 |
| 2015 | Sweetwater Valley (Bonita, Southern California) 12, Waipio (Waipahu, Hawaii) 10 |
| 2014 | Mountain Ridge (Las Vegas, Nevada) 11, Pacifica (Northern California) 2 |
| 2013 | Eastlake (Chula Vista, Southern California) 9, Belmont-Redwood Shores (Northern California) 0 |
| 2012 | Petaluma National (Northern California) 6, Nanakuli (Waianae, Hawaii) 5 |
| 2011 | Ocean View (Huntington Beach, Southern California) 2, Red Bluff (Northern California) 1 |
| 2010 | Waipio (Waipahu, Hawaii) 4, Ocean View (Huntington Beach, Southern California) 1 |
| 2009 | Park View (Chula Vista, Southern California) 11, Lakeside (Granite Bay/Loomis, Northern California) 4 |
| 2008 | Waipio (Waipahu, Hawaii) 4, Paseo Verde (Las Vegas, Nevada) 3 |
| 2007 | Chandler National (Arizona) 7, Solana Beach (Southern California) 3 |
| 2006 | Ahwatukee American (Phoenix, Arizona) 11, River Park (Fresno, Northern California) 3 |
| 2005 | Rancho Buena Vista (Vista, Southern California) 7, Tracy National (Northern California) 2 |
| 2004 | Conejo Valley East (Thousand Oaks, Southern California) 8, Green Valley (Henderson, Nevada) 5 |
| 2003 | Chandler National (Arizona) 2, Vineyard (Rancho Cucamonga, Southern California) 0 |
| 2002 | Aptos (Northern California) 4, Arrowhead (Glendale, Arizona) 3 |
| 2001 | Oceanside American (Southern California) 12, Green Valley (Henderson, Nevada) 8 |
Western Region Tournament (1957-2000)
| Year | Result |
| 2000 | Hazel Dell (Washington) 3, Ocean View (Huntington Beach, Southern California) 2 |
| 1999 | South Central Boise (Idaho) 3, Airport (Sacramento, Northern California) 1 |
| 1998 | Cypress Federal (Southern California) 3, Woodinville West (Washington) 1 (7 innings) |
| 1997 | South Mission Viejo (Southern California) 2, Sunnyvale National (Northern California) 1 |
| 1996 | Moorpark (Southern California) 2, Pearl City (Hawaii) 1 |
| 1995 | Yorba Hills (Yorba Linda, Southern California) 5, Petaluma Valley (Northern California) 3 |
| 1994 | Northridge City (Southern California) 17, Nanakuli-Maili (Waianae, Hawaii) 7 |
| 1993 | Long Beach (Southern California) 5, San Ramon Valley (Danville, Northern California) 2 |
| 1992 | Long Beach (Southern California) 11, San Ramon Valley (Danville, Northern California) 3 |
| 1991 | San Ramon Valley (Danville, Northern California) 3, East Maui (Kahulia, Hawaii) 0 |
| 1990 | Cypress Federal (Southern California) 3, East Boise (Idaho) 2 |
| 1989 | Eastview (San Pedro, Southern California) 3, Pearl City (Hawaii) 2 |
| 1988 | Pearl City (Hawaii) 10, East Boise (Idaho) 1 |
| 1987 | Northwood (Irvine, Southern California) 15, San Benito County (Hollister, Northern California) 0 |
| 1986 | Tucson International (Arizona) 5, Marysville (Washington) 2 |
| 1985 | Mexicali, Mexico (Southern California) 2, Danville (Northern California) 0 |
| 1984 | Los Gatos (Northern California) 1, Sunnyside (Tucson, Arizona) 0 |
| 1983 | Pacific (Sacramento, Northern California) 8, Green Valley (Henderson, Nevada) 3 |
| 1982 | Kirkland National (Washington) 3, South Bay (Chula Vista, Southern California) 1 |
| 1981 | Escondido National (Southern California) 5, Kennewick (Washington) 4 (7 innings) |
| 1980 | Kirkland National (Washington) 2, Sunshine (San Diego, California) 0 |
| 1979 | Campbell (Northern California) 11, Goleta Valley South (Southern California) 3 |
| 1978 | San Ramon Valley (Danville, Northern California) 6, Kailua National (Hawaii) 0 |
| 1977 | El Cajon Western (Southern California) 5, Raleigh Hills (Beaverton, Oregon) 4 (7 innings) |
| 1976 | Campbell (Northern California) 6, Pearl City (Hawaii) 2 |
| 1975 | Northridge American (Northern California) 6, Kailua (Hawaii) 1 |
| 1974 | Red Bluff (Northern California) 5, San-Ri (San Bernardino/Rialto, Southern California) 4 |
| 1973 | Cactus (Tucson, Arizona) 1, Concord National (California) 0 |
| 1972 | Pearl City (Hawaii) 13, Portland Northeast (Oregon) 4 (7 innings) |
| 1971 | Wahiawa (Hawaii) 4, Cupertino American (Northern California) 3 |
| 1970 | Campbell (Northern California) 4, Kaneohe (Hawaii) 3 (8 innings) |
| 1969 | Briarwood (Santa Clara, Northern California) 4, Cajon de Oro (El Cajon, Southern California) 3 |
| 1968 | Bolsa (Garden Grove, Southern California) 4, Santa Clara Westside (Northern California) 3 (7 innings) |
| 1967 | Northridge City (Southern California) 5, Ravenswood (East Palo Alto, Northern California) 1 |
| 1966 | Airport (Sacramento, Northern California) 9, Eastside Optimist (Roswell, New Mexico) 4 |
| 1965 | South Mountain-East Side (Phoenix, Arizona) 3, South Suburban (Klamath Falls, Oregon) 1 |
| 1964 | La Puente National (Southern California) 4, Trail (British Columbia) 3 |
| 1963 | Granada Hills National (Southern California) 2, Sahuaro (Tucson, Arizona) 0 |
| 1962 | Campbell-Moreland (Northern California) 3, Kailua National (Hawaii) 1 |
| 1961 | El Cajon Northern (Southern California) 5, Concord National (Northern California) 1 |
| 1960 | East Lakewood (Southern California) 10, South Boulder (Colorado) 4 |
| 1959 | Auburn (Northern California) 11, Alcoa (Vancouver, Washington) 3 |
| 1958 | Rose City (Portland, Oregon) 2, Town and Country (Sacramento, California) 0 |
| 1957 | La Mesa Northern (California) 18, Ephrata-Soap Lake (Washington) 0 |