Little League World Series 1957–2000 (West Region)
The original West Region was a region that competed in the Little League World Series between and until it was split into a Northwest Region and a new West Region in 2001.
The West Region was inaugurated in 1957. The Region consisted of teams from Alaska, Arizona, Northern California, Southern California, Colorado, Hawaii, Idaho, Montana, Nevada, New Mexico, Oregon, Utah, Washington, and Wyoming. Before 1962, Hawaiian teams competed in the Pacific Region. Prior to 1966, teams from Western Canada also competed in the West Region.
Little League Baseball expanded the LLWS to sixteen teams for the 2001 Little League World Series. At the same time, the original West Region was split into a new West Region and a Northwest Region. Colorado and New Mexico moved to the Southwest Region for the 2002 tournament. Between 2002 and 2005, Hawaii competed in the Northwest Region and Wyoming competed in the West Region, before switching back to the original configuration in 2006.
Champions in the West Region (1957–2000)
The following table indicates the West Region champion and its LLWS performance in each year between 1957 and 2000.| Year | Champion | City | LLWS | Record |
| Northern La Mesa LL |  La Mesa, California | Runner-Up | 1–1 | |
| Rose City LL |  Portland, Oregon | 1st Round | 0–1 | |
| West Auburn LL | Auburn, California | Runner-Up | 2–1 | |
| East Lakewood LL | Lakewood, California | 3rd Place | 2–1 | |
| Northern LL | El Cajon, California | Champions | 3–0 | |
| Moreland LL | San Jose, California | Champions | 3–0 | |
| Granada Hills National LL | Granada Hills, California | Champions | 3–0 | |
| National LL | La Puente, California | 7th Place | 1–2 | |
| South Mountain LL |  Phoenix, Arizona | 7th Place | 1–2 | |
| Airport LL | Sacramento, California | 3rd Place | 2–1 | |
| Northridge City LL | Northridge, California | 5th Place | 1–1 | |
| Bolsa LL | Garden Grove, California | 3rd Place | 2–1 | |
| Briarwood LL | Santa Clara, California | Runner-Up | 2–1 | |
| Campbell LL | Campbell, California | Runner-Up | 2–1 | |
| Wahiawa American LL |  Oahu, Hawaii | 3rd Place | 2–1 | |
| Community LL | Pearl City, Hawaii | 3rd Place | 1–1 | |
| Cactus LL | Phoenix, Arizona | Runner-Up | 2–1 | |
| Red Bluff LL | Red Bluff, California | Runner-Up | 2–1 | |
| American LL | Northridge, California | 4th Place | 0–2 | |
| Campbell LL | Campbell, California | Runner-Up | 2–1 | |
| Western LL | El Cajon, California | Runner-Up | 2–1 | |
| San Ramon Valley LL | Danville, California | Runner-Up | 2–1 | |
| Campbell LL | Campbell, California | Runner-Up | 2–1 | |
| National LL |  Kirkland, Washington | 3rd Place | 2–1 | |
| National LL | Escondido, California | 5th Place | 2–1 | |
| National LL | Kirkland, Washington | Champions | 3–0 | |
| Pacific LL | Sacramento, California | 6th Place | 1–2 | |
| Los Gatos LL | Los Gatos, California | 6th Place | 1–2 | |
| Mexicali LL |  Mexicali, Mexico | Runner-Up | 2–1 | |
| International LL | Tucson, Arizona | Runner-Up | 2–1 | |
| Northwood LL | Irvine, California | Runner-Up | 2–1 | |
| Pearl City LL | Pearl City, Hawaii | Runner-Up | 2–1 | |
| Eastview LL | San Pedro, California | 4th Place | 1–2 | |
| Federal LL | Cypress, California | 4th Place | 1–2 | |
| San Ramon Valley LL | Danville, California | Runner-Up | 2–1 | |
| Long Beach LL | Long Beach, California | Champions | 5–0 | |
| Long Beach LL | Long Beach, California | Champions | 5–0 | |
| Northridge City LL | Northridge, California | Runner-Up | 3–2 | |
| Yorba Hills LL | Yorba Linda, California | 3rd Place | 2–2 | |
| Moorpark LL | Moorpark, California | 3rd place, Group Stage | 1–2 | |
| South Mission Viejo LL | Mission Viejo, California | Runner-Up | 4–1 | |
| Cypress LL | Cypress, California | 3rd place, Group Stage | 1–2 | |
| South Central Boise LL |  Boise, Idaho | 3rd place, Group Stage | 1–2 | |
| Hazel Dell LL | Vancouver, Washington | 3rd place, Group Stage | 2–1 |
Champions in the Pacific Region (1958–1961)
A team from Hawaii represented the Pacific Region in the Little League World Series between 1958 and 1961. Between 1958 and 1960, the Hawaiian state champions received an automatic berth ; in 1961, Hilo American Little League defeated a team from Japan in a playoff for the Pacific Region berth. Starting in 1962, teams from Japan competed in the newly created Far East Region and Hawaii moved to the West Region.| Year | Champion | City | LLWS | Record |
| Pearl Harbor LL | Honolulu, Hawaii | 1st Round | 0–1 | |
| Windward LL | Oahu, Hawaii | 4th Place | 0–2 | |
| Pearl Harbor LL | Honolulu, Hawaii | 5th Place | 2–1 | |
| Hilo American LL | Hilo, Hawaii | 4th Place | 1–2 |
Results by state
Total does not include Hawaii's four appearances representing the Pacific Region in the tournament. "Italics" indicates team is no longer in region.| Country | West Region Championships | LLWS Championships | Record in LLWS | PCT |
| California | 32 | 5 | 66–36 | .647 |
| Washington | 3 | 1 | 7–2 | .778 |
| Hawaii | 3 | 0 | 5–3 | .625 |
| Arizona | 3 | 0 | 5–4 | .556 |
| Idaho | 1 | 0 | 2–1 | .667 |
| Oregon | 1 | 0 | 0–1 | .000 |
| Mexico | 1 | 0 | 2–1 | .667 |
| Total | 44 | 6 | 87–49 | .640 |