Sebastião Custódio de Sousa Teles (Faro, 27 July 1847 – Lisbon, 7 June 1921), also known as Sousa Teles or in contemporary Portuguese as Sousa Telles, was a Portuguese politician and military officer who, among other functions, served briefly as President of the Council of Ministers (Prime Minister) from 11 April to 14 May 1909, during one of the final years of the Portuguese constitutional monarchy.