Ruth Durlacher (née Dyas; 22 July 1876 – 21 September 1946) was an Irish tennis player.
Durlacher played at the Wimbledon Championships between 1897 and 1907. In 1899 she won the doubles tournament. In singles, Durlacher reached the finals of the all-comers-competition, losing to the later champion Blanche Bingley. She won the Irish Championships mixed doubles title along with Harold Nisbet in 1898, and with Laurence Doherty 1901 and 1902. In the singles event, she was a runner-up in 1897, 1899, 1901 and 1902. In the 1902 final she was unable to convert a matchpoint against Louisa Martin.
- Belfast, Northern Ireland, The Belfast Newsletter (Birth, Marriage and Death Notices), 1738-1925
- Ireland, Select Births and Baptisms, 1620-1911
- Dorothea Chambers (1910): Lawn Tennis for Ladies. Methuen & Co. Ltd., London. (online)
- 1911 England Census
- England & Wales, National Probate Calendar (Index of Wills and Administrations), 1858-1966, 1973-1995