The Gonzaga–Saint Mary's men's basketball rivalry is an intra-West Coast Conference college basketball rivalry between the Saint Mary's Gaels men's basketball team of Saint Mary's College of California in Moraga, California and the Gonzaga Bulldogs men's basketball team of Gonzaga University in Spokane, Washington.

Many analysts and members of the media have touted the Gaels vs. Zags as one of the best, if not the best, college basketball rivalry on the West Coast;[1][2] both teams have been consistently two of the top three teams in the West Coast Conference over the last two decades.

Gonzaga and Saint Mary's have combined to win 26 out of the last 30 conference championship games, including each of the last 16.

The two teams have met a total of 116 times dating back to 1955 and currently meet biannually as a part of WCC conference play, with the potential to play a third game in the WCC tournament and a fourth in the postseason.

[3] Saint Mary's has upset a number 1 ranked Zags squad twice – once in the 2019 WCC final as an unranked team and once in 2022 as #23 in Moraga.