Beryl Mercer (August 13, 1882 – July 28, 1939) was a Spanish-born American actress of stage and screen who was based in the United States.

Her father was Edward Sheppard Mercer, said to be Spanish despite his name, and her mother was actress Effie Martin.

[2][note 1][3] She became a child actress, making her debut on 14 August 1886 at the Theatre Royal, Great Yarmouth, when she was age 4 and returned to the stage when she was ten.

In London, she appeared in The Darling of the Gods and the production by Oscar Asche of A Midsummer Night's Dream.

[8] On July 28, 1939, Mercer died in Santa Monica, California, aged 56, following surgery for an undisclosed ailment.