The 1955–56 San Francisco Dons men's basketball team represented the University of San Francisco as a member of the California Basketball Association during the 1955–56 NCAA men's basketball season. The Dons ended the season undefeated, becoming the first NCAA tournament champion to record a perfect season and the first team to go wire-to-wire as No. 1 in the AP and UP polls. San Francisco finished the season with a 29–0 record (14–0 CBA) and had won 55 consecutive games.