Agustín Mario Cejas (22 March 1945 – 14 August 2015) was a former Argentine football goalkeeper. He played for a number of clubs in Argentina and Brazil and has the all-time record number of appearances for Racing Club de Avellaneda. He was born in Buenos Aires. Cejas played for Argentina at the 1964 Summer Olympics.
Cejas died of Alzheimer's disease on August 14, 2015 in Brazil, aged 70.