Baltasar Hidalgo de Cisneros de la Torre (1758–1829) was a Spanish naval officer born in Cartagena. He participated in the Battle of Trafalgar in 1805, and in the Spanish resistance against Napoleon's invasion in 1808.
In 1809, he was appointed Viceroy of the Rio de la Plata, replacing Santiago de Liniers. He was deposed on 25 May 1810 (May Revolution) by a group of local leaders of Buenos Aires that wanted an independent government for the South American colonies.
