Mariátegui is a surname of Basque origins. Notable people with the name include:
Javier Mariátegui (1928–2008), Peruvian intellectual and psychiatrist José Carlos Mariátegui (1894–1930), Peruvian intellectual, journalist, political philosopher, and activist José-Carlos Mariátegui (born 1975), Peruvian scientist, writer, curator and scholar Manuel de Mariátegui, 1st Count of San Bernardo (1842–1905), Spanish noble and politician Sandro Mariátegui Chiappe (1921–2013), Peruvian politician who was the prime minister of Peru
See also BAP Mariátegui (FM-54), Peruvian Carvajal-class frigate Mariategui JLT, Peruvian insurance brokerage company