Alyssa Whitall "Alys" Pearsall Smith (21 July 1867 – 22 January 1951) was an American-born British Quaker relief organiser and the first wife of Bertrand Russell.

She was the sister of essayist and critic Logan Pearsall Smith and the cousin of Martha Carey Thomas.

On 13 December 1894, Smith married Bertrand Russell, son of the Viscount and Viscountess Amberley[2] in the Quaker Meeting House in St. Martin's Lane, London, England.

[5] Pearsall Smith chaired the Italian Refugees' Relief Committee to help people fleeing Benito Mussolini's Italy.

[6] This centre provided a range of services aimed at reducing infant mortality, such as weighing babies, providing expectant and nursing mothers with meals, and medical and mothering advice.