The 2015–16 Lamar Lady Cardinals basketball team represented Lamar University during the 2015–16 NCAA Division I women's basketball season. The Lady Cardinals, led by third year head coach Robin Harmony, played their home games at the Montagne Center and are members of the Southland Conference. They finished the season with a 12-19 overall record and a 7-11 conference record. Qualifying for the conference tournament, the Lady Cardinals won the first game against Houston Baptist and were eliminated by McNeese State.