Evelyn Murrough O'Brien Toulmin (13 August 1877 – 7 January 1945) was an Anglo-Argentine cricketer. Toulmin was a left-handed batsman who bowled right-arm slow. The son of Reverend Frederick Bransby Toulmin and Katherine O'Brien (sister of the 13th Baron Inchiquin), he was born at Hatfield Peverel, Essex, and educated at the King's School, Oxford. Toulmin was the third husband of Cornelia "Constance" Toulmin. He died at Paris, France on 7 January 1945.