The 1990 Southland Conference men's basketball tournament was held March 5–7 at Fant-Ewing Coliseum in Monroe, Louisiana.
[1] Northeast Louisiana defeated North Texas in the championship game, 84–68, to win their first Southland men's basketball tournament.
The Warhawks received a bid to the 1990 NCAA Tournament as the #15 seed in the Midwest region.
They were seeded based on regular season conference records, with the top team earning a bye into the semifinal round.
Games in the quarterfinal round were played at the home court of the higher-seeded team.