Guillermo Enrique Billinghurst Angulo (27 July 1851, Arica – 28 June 1915, Iquique) was a Peruvian politician of English descent who served as the 37th President of Peru.

During his presidency, Billinghurst became embroiled in an increasingly bitter series of conflicts with Congress, ranging from proposed advanced social legislation to settlement of the Tacna-Arica dispute.

It established that before a plebiscite could be held between both countries, an arbitrage would first be requested to the Queen of Spain, María Cristina de Habsburgo-Lorena (1858–1929) to determine the conditions of the vote.

Billinghurst was overthrown on 4 February 1914, in a military coup headed by colonel Oscar R. Benavides, Javier and Manuel Prado, and conservatives members of the Civilista Party.

Later in exile, Billingshurst declared: "The young Prado, in an extense and pathetic speech, gave me the details and motives behind the coup: All of them (the mutineerered) recognised my patriotism, integrity and my capability to handle the government.