Pedro Sarsfield y Waters (died 1837) was a Spanish general of Irish descent who commanded an infantry division during the Peninsular War.

[1] He is one of the Spanish generals who were second- or third generation descendants of those came from Ireland after the Battle of Boyne (1690).

Remnants of his division later joined Marques de Campoverde's operation against the French forces led by Louis-Gabriel Suchet, who were occupying the Tarragona fortress.

[3] After the Napoleonic Wars, Sarsfield remained loyal to King Ferdinand VII of Spain.

He opposed the French intervention to restore Ferdinand, known as the Hundred Thousand Sons of Saint Louis.