Mary Ann Yates (1728–1787) was an English tragic actress. The daughter of William Graham, a ship's steward and his wife, Mary, she married Richard Yates (c. 1706-1796), a well-known comedian of the time.
In 1753, aged 25, she appeared at Drury Lane as Marcia in Samuel Crisp's Virginia. David Garrick played the part of Virginius. Yates was gradually entrusted with all the leading parts and succeeded the then famous actress Mrs Cibber as the leading tragedienne of the English stage.
Yates was in turn succeeded and eclipsed by the famous Sarah Siddons. There were benefit performances for her in 1797 at The Haymarket which included an appearance by Harriett Litchfield.