Pedro Cevallos Guerra (1 August 1759 – 29 May 1838) was a Spanish statesman and diplomat who served as Chief Minister from 1799 to 1808 during the Napoleonic Wars, although Manuel Godoy, a personal favourite of the Spanish King, had a vast influence over political affairs.

In 1790 Cevallos switched to the diplomatic service, serving from 1793 to 1795 as First Secretary to the Spanish Embassy in Lisbon.

In 1799, the Spanish King Charles IV appointed Cevallos as Secretary of State, the de facto Chief Minister, which office he held until 1808.

His successor, Crown Prince Ferdinand, chose to meet Napoleon in the Pyrenees and try to negotiate a cessation of hostilities, but was seized by the French and taken as a prisoner to France.

Cevallos tendered his resignation on 7 July and fled to London for the remainder of the war, returning to Spain once Madrid had been liberated in 1814.