The 2023–24 Lamar Cardinals basketball team represented Lamar University during the 2023–24 NCAA Division I men's basketball season.

The Cardinals were led by third-year head coach Alvin Brooks and played their home games at the Neches Federal Credit Union Arena at the Montagne Center in Beaumont, Texas.

As the fourth-seeded team, the Cardinals were 1–1 in the SLC tournament defeating eighth-seeded New Orleans 71–57[1] and losing to top-seeded McNeese 57–76 in the semifinal round.

Receiving 45 votes overall, the Cardinals were picked to finish ninth in the conference.

[6] No Cardinals were selected as members of a preseason all-conference team.