The Tigers (8-8, 3-0 Ivy League) converted 8 of 14 tries from beyond the arc, while Cornell (14-7, 4-1) made just 2 of 17. Overall Princeton shot 50 percent from the field, while holding the Big Red to 32 percent.
Louis Dale, with 12 points, was the only Cornell player in double figures.
The Tigers never trailed and were tied only once, at 4-4.
The Big Red made a run to cut what was once a 14-point lead to three at 34-31 as late as the 12-minute mark of the second half. But Princeton went on a 17-6 run to regain what was then its largest lead and cruised from there.
Mississippi State freshman guard Malik Newman will withdraw from the NBA draft, but sources told ESPN he might explore other opportunities besides returning to Mississippi State.
Seton Hall sophomore Isaiah Whitehead will stay in the NBA draft and not return for his junior season.
Washington State's trio of Josh Hawkinson, Conor Clifford and Ike Iroegbu have withdrawn from the NBA draft and will play their senior season with the Cougars.