Elsa O'Connor (1905–1947) was an Argentine stage and film actress, notable for her work during the Golden Age of Argentine cinema.

[1] The daughter of actress and journalist Amelia Monti, who introduced her to the stage, she debuted with the Blanca Podestá company in 1923.

O`Connor was awarded the prize to the best dramatic actress for her role in Himeneo and Celos.

Her most successful role in theatre was in 1944 as Bella in the play Luz de Gas, by Narciso Ibáñez Menta, an adaptation of Patrick Hamilton's Gas Light.

Elsa O'Connor died in Montevideo from a traumatic brain injury on 7 April 1947, several days after falling down a staircase while acting in the play La Gata.