The 2020 Lamar Cardinals football team represented Lamar University in the 2020–21 NCAA Division I FCS football season as a member of the Southland Conference. The Cardinals were led by first-year head coach Blane Morgan and played their home games at Provost Umphrey Stadium. Originally scheduled to play an eleven-game regular season schedule in 2020, the Cardinals played shortened 6 game schedule in Spring 2021 with all games against conference members due to the COVID19 Pandemic. The Cardinals finished the season with a 2–4 overall record. The conference record was also 2–4 tied for fifth place with McNeese.