Ruth Durlacher (née Dyas) was an Irish tennis player around 1900.
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 mixed championships along with Harold Nisbet in 1898, and with Laurence Doherty 1901 and 1902.
Durlacher was married to Neville John Durlacher. Their children were Patrick Durlacher, a cricketer, and Nora Durlacher, who played tennis in the 1919 Irish championships.