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The division was created at the start of the 2004–05 season, when the league expanded from 29 to 30 teams with the addition of the Charlotte Bobcats. In doing so, the league realigned itself from two divisions in each conference to three divisions in each conference. The Northwest Division began with five inaugural members: the Nuggets, the Timberwolves, the Trail Blazers, the SuperSonics and the Jazz. The Trail Blazers and SuperSonics joined from the Pacific Division, while the Nuggets, the Timberwolves and Jazz joined from the now-defunct Midwest Division. The SuperSonics moved to Oklahoma City prior to the 2008–09 season and became the Thunder, but remained in the Northwest Division. Other than this franchise re-location, the division's membership has remained unchanged since its creation.
The most recent division champions are the Denver Nuggets, having won a sixth division championship in the 2022–23 NBA season. They along with the SuperSonics-Thunder franchise have won the most Northwest Division titles with six each, while the Jazz have won five, the Trail Blazers have won two, and the Timberwolves have never won the Northwest Division title. In the 2009–10 season, all four teams that qualified for the playoffs each had more than 50 wins, and in 2018–19 all four teams that qualified for the playoffs had at least 49 wins.
Since the 2021–22 season, the Northwest Division champion has received the Sam Jones Trophy, named after Hall of Famer Sam Jones, who notably spent his career playing for the Boston Celtics and did not play for a team currently in the division, though he was assistant coach for the Jazz during their first NBA season in 1974–75 when they were based in New Orleans.
Beginning with the 2021–22 season, the Northwest Division champion has received the Sam Jones Trophy. As with the other division championship trophies, it is named after one of the African American pioneers from NBA history. During his playing career from 1957 to 1969, Sam Jones was an integral part of a Boston Celtics dynasty that won 10 NBA championships during that span. The Jones Trophy consists of a 200-millimetre (7.9 in) crystal ball.
Division champions
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Had or tied for the best regular season record for that season
Jenkins, Lee (December 5, 2011). "'tis The Season". CNN Sports Illustrated. Time Warner Company. Archived from the original on December 10, 2011. Retrieved April 30, 2012.