1999–2000 Princeton Tigers men's basketball team

The 1999–2000 Princeton Tigers men's basketball team represented the Princeton University in intercollegiate college basketball during the 1999–2000 NCAA Division I men's basketball season. The head coach was Bill Carmody and the team co-captains were Mason Rocca and Chris Young.

Using the Princeton offense, the team recovered from a 1–4 start and posted a 19–11 overall record and an 11–3 conference record. On December 18, 1999, against , Spencer Gloger made 10 three-point field goals in a single game to tie Matt Maloney's current Ivy League record with a total that continues to stand as the highest total by an Ivy League player against a non-league foe. In the National Invitation Tournament the team lost its first round contest against the at Bryce Jordan Center State College, Pennsylvania, on March 15 by a 55–41 score.

The team was led by All-Ivy League first team selection Chris Young. Young led the Ivy League in field goal percentage with a 55.3% average in conference games. He also led the conference in blocked shots with 90, which continues to be the second highest single-season total in league history.

This was the last season as coach for Carmody who gave way to John Thompson III the following year. Carmody retired with the Ivy League's all-time highest winning percentage in all games (78.6%, 92–25), surpassing Butch van Breda Kolff's 76.9% mark, and in conference games (89.3%, 50–6), surpassing Chuck Daly's 88.1% mark.