Patricia Russell, Countess Russell (1910 – 2004) was the third wife of philosopher Bertrand Russell and a significant contributor to his book A History of Western Philosophy.^[1]

Lady Russell was born Marjorie Helen Spence in 1910. As her parents had always wanted a boy, she was known as 'Peter', a nickname she retained throughout her life.^[2][3] She met Bertrand Russell in 1930, when he was 58 and she was a 20-year-old undergraduate at the University of Oxford, hired by Russell's second wife Dora Black as a governess. They had an affair and were married at the Midhurst register office on 18 January 1936. They had one son, Conrad Sebastian Robert Russell, 5th Earl Russell, who became a prominent historian and one of the leading figures in the Liberal Democrat party. They had an acrimonious separation in 1949.^[4]

Patricia was a member of the first board of the Harlow Development Corporation, serving from 1947 to 1950.^[5]