1998 NCAA Division I men's lacrosse tournament

The 1998 NCAA Division I lacrosse tournament was the 28th annual tournament hosted by the National Collegiate Athletic Association to determine the team champion of men's college lacrosse among its Division I programs, held at the end of the 1998 NCAA Division I men's lacrosse season.

Princeton defeated Maryland in the final, 15–5. This was Princeton's third consecutive national championship under Head Coach Bill Tierney, and their fifth title since 1992.

The championship game was played at Rutgers Stadium at Rutgers University in Piscataway, New Jersey, with 21,194 fans in attendance.

Qualifying
Twelve NCAA Division I college men's lacrosse teams met after having played their way through a regular season, and for some, a conference tournament.

Butler, Hobart, and UMBC made their debut appearances in the Division I lacrosse tournament.

Bracket

 * * = Overtime

All-Tournament Team

 * Corey Popham, Princeton (Named the tournament's Most Outstanding Player)
 * Christian Cook, Princeton
 * Jesse Hubbard, Princeton
 * Jon Hess, Princeton
 * Josh Sims, Princeton
 * Scott Hochstadt, Maryland
 * Mike Bonnani, Maryland
 * Brian Haggerty, Maryland
 * Casey Powell, Syracuse
 * Ryan Powell, Syracuse
 * Luke Parrott
 * Brian Woody