1998–99 Lafayette Leopards men's basketball team

The 1998–99 Lafayette Leopards men's basketball team represented Lafayette College during the 1998–99 NCAA Division I men's basketball season. The Leopards, led by 4th year head coach Fran O'Hanlon, played their home games at the Kirby Sports Center and were members of the Patriot League. They finished the season 22–8, 10–2 in Patriot League play to finish tied for first place. They defeated Army, Lehigh, and Navy to win the Patriot League tournament to receive an automatic bid to the NCAA tournament. As No. 15 seed in the East region, they lost in the opening round to No. 2 seed Miami (FL).

Schedule and results
!colspan=9 style=| Regular season

!colspan=9 style=| Patriot League Tournament

!colspan=9 style=| NCAA Tournament

Awards and honors

 * Brian Ehlers – Patriot League Player of the Year