Seminario is a surname. Notable people with the surname include:
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Diego Seminario (born 1989), Peruvian actor and industrial designer
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Juan Seminario (born 1936), Peruvian footballer
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Miguel Grau Seminario
Miguel María Grau Seminario (27 July 1834 – 8 October 1879) was a Peruvian Navy officer and politician best known for his actions during the War of the Pacific. He was nicknamed "Gentleman of the Seas" for his kind and chivalrous treatment ...
(1834–1879), Peruvian naval officer
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Spanish-language surnames