Leonardo Argüello Barreto (29 August 1875 – 15 December 1947) was a Nicaraguan politician who, after several attempts, became the President of Nicaragua in 1947.
He served from 1 May to 27 May 1947.A member of the Nationalist Liberal Party, his presidency was cut short by a Coup d'état orchestrated by the Commander of the National Guard, General Anastasio Somoza García.