The Northwest League of Minor League Baseball is one of three High-A baseball leagues in the United States and notably the only league with a team in Canada. A league champion is determined at the end of each season. Champions have been determined by postseason playoffs, winning the regular season pennant, or being declared champion by the league office. As of 2022, the first- and second-half winners meet in a best-of-five series to determine a league champion. If the same team wins both halves, the team with the next best full-season winning percentage will qualify.

League champions Score and finalist information is only presented when postseason play occurred. The lack of this information indicates a declared league champion.

YearChampionScoreFinalist1955Eugene Emeralds4–2Salem Senators1956Yakima Bears——1957Wenatchee Chiefs4–3Eugene Emeralds1958Yakima Bears4–1Lewiston Broncs1959Yakima Bears4–1Salem Senators1960Yakima Bears——1961Lewiston Broncs4–1Yakima Bears1962Wenatchee Chiefs4–2Tri-City Braves1963Yakima Bears3–1Lewiston Broncs1964Yakima Bears3–0Eugene Emeralds1965Tri-City Atoms3–0Lewiston Broncs1966Tri-City Atoms——1967Medford Giants——1968Tri-City Atoms——1969Rogue Valley Dodgers——1970Lewiston Broncs——1971Tri-City Padres——1972Lewiston Broncs——1973Walla Walla Padres——1974Eugene Emeralds2–1Bellingham Dodgers1975Eugene Emeralds2–0Portland Mavericks1976Walla Walla Padres2–1Portland Mavericks1977Bellingham Mariners2–1Portland Mavericks1978Grays Harbor Loggers1–0Eugene Emeralds1979Central Oregon Phillies2–1Walla Walla Padres1980Bellingham MarinersEugene Emeralds1–1—1981Medford Athletics2–1Bellingham Mariners1982Salem Angels2–0Medford Athletics1983Medford Athletics2–0Bellingham Mariners1984Tri-Cities Triplets1–0Medford Athletics1985Everett Giants1–0Eugene Emeralds1986Bellingham Mariners1–0Eugene Emeralds1987Spokane Indians2–1Everett Giants1988Spokane Indians2–1Southern Oregon Athletics1989Spokane Indians2–1Southern Oregon Athletics1990Spokane Indians2–1Boise Hawks1991Boise Hawks2–0Yakima Bears1992Bellingham Mariners2–0Bend Rockies1993Boise Hawks2–0Bellingham Mariners1994Boise Hawks2–1Yakima Bears1995Boise Hawks2–1Bellingham Giants1996Yakima Bears2–0Eugene Emeralds1997Portland Rockies3–2Boise Hawks1998Salem-Keizer Volcanoes3–0Boise Hawks1999Spokane Indians3–0Portland Rockies2000Yakima Bears3–2Eugene Emeralds2001Salem-Keizer Volcanoes3–0Boise Hawks2002Boise Hawks3–0Everett AquaSox2003Spokane Indians3–0Salem-Keizer Volcanoes2004Boise Hawks3–0Vancouver Canadians2005Spokane Indians3–2Vancouver Canadians2006Salem-Keizer Volcanoes3–1Boise Hawks2007Salem-Keizer Volcanoes3–1Tri-City Dust Devils2008Spokane Indians3–1Salem-Keizer Volcanoes2009Salem-Keizer Volcanoes3–1Tri-City Dust Devils2010Everett AquaSox2–1Spokane Indians2011Vancouver Canadians2–1Tri-City Dust Devils2012Vancouver Canadians2–1Boise Hawks2013Vancouver Canadians2–1Boise Hawks2014Hillsboro Hops2–0Vancouver Canadians2015Hillsboro Hops2–1Tri-City Dust Devils2016Eugene Emeralds2–1Everett AquaSox2017Vancouver Canadians3–1Eugene Emeralds2018Eugene Emeralds3–0Spokane Indians2019Hillsboro Hops3–2Tri-City Dust Devils20202021Eugene Emeralds3–1Spokane Indians2022Eugene Emeralds3–0Vancouver Canadians2023Vancouver Canadians3–1Everett AquaSox2024Spokane Indians3–1Vancouver Canadians2025Everett AquaSox3–1Eugene Emeralds2026Vancouver Canadians3–0Eugene Emeralds

Championship wins by team Active Northwest League teams appear in bold.

WinsTeamChampionship years9Spokane Indians1987, 1988, 1989, 1990, 1999, 2003, 2005, 2008, 20248Eugene Emeralds1955, 1974, 1975, 1980, 2016, 2018, 2021, 20228Yakima Bears1956, 1958, 1959, 1960, 1963, 1964, 1996, 20006Boise Hawks1991, 1993, 1994, 1995, 2002, 20046Vancouver Canadians2011, 2012, 2013, 2017, 2023, 20265Salem-Keizer Volcanoes1998, 2001, 2006, 2007, 20095Tri-City Atoms/Padres/Tri-Cities Triplets1965, 1966, 1968, 1971, 19844Bellingham Mariners1977, 1980, 1986, 19924Lewiston Broncs1961, 1970, 1972, 19733Everett Giants/AquaSox1985, 2010, 20253Hillsboro Hops2014, 2015, 20192Medford Athletics1981, 19832Wenatchee Chiefs1957, 19621Central Oregon Phillies19791Grays Harbor Loggers19781Medford Giants19671Portland Rockies19971Rogue Valley Dodgers19691Salem Angels19821Walla Walla Padres1976

Notes Bellingham and Eugene were declared co-champions. Spokane had the best league record in both the first and second halves of the season. Vancouver was named Spokane's opponent in the 2024 championship series by virtue of having the second-best full-season record.

References