1964–65 Princeton Tigers men's basketball team

The 1964–65 Princeton Tigers men's basketball team represented Princeton University in intercollegiate college basketball during the 1964–65 NCAA University Division men's basketball season. Butch van Breda Kolff served as head coach and the team captain was Bill Bradley. The team played its home games in the Dillon Gymnasium in Princeton, New Jersey. The team was the champion of the Ivy League, earning an invitation to the 23-team 1965 NCAA Men's Division I Basketball Tournament.

The team posted a 23–6 overall record and a 13–1 conference record. The team won its NCAA Men's Division I Basketball Tournament East region first round contest against the Penn State Nittany Lions by an 60–58 margin at The Palestra on March 8, 1965. Then in the East Regional at Cole Field House in College Park, Maryland, the team defeated NC State 66–48 on March 12 and Providence 109–69 on March 13. Then on March 19 in the national semifinal at the Memorial Coliseum Portland, Oregon, the team was defeated by the Cazzie Russell-led Michigan Wolverines 93–76 before beating the Wichita State Shockers 118–82 the following night.Bill Bradley earned the NCAA Basketball Tournament Most Outstanding Player award.