Pedro Manuel de Ataíde, 5th Count of Atalaia (1665 – 19 September 1722) was a Portuguese Army officer and nobleman who served during the War of the Spanish Succession.

After being pardoned by king Peter II of Portugal in 1704, he returned to his home country and served under his father and uncle, supreme commander António Luís de Sousa, 2nd Marquis of Minas, in the War of the Spanish Succession.

He participated in the Portuguese occupation of Madrid in 1706 and the following retreat to Catalonia.

With his father killed and his uncle recalled to Lisbon, he became the commander of the Portuguese forces in Catalonia.

Here he became Grandee of Spain, and was made Viceroy of Sardinia, General of the Cavalry in Naples and Governor of Castelnuovo.