Ernesto, form of the name Ernest in several Romance languages, may refer to:

• Ernesto (novel) (1953), an unfinished autobiographical novel by Umberto Saba, published posthumously in 1975
  • Ernesto (film), a 1979 Italian drama loosely based on the novel
• Hurricane Ernesto (disambiguation), several hurricanes or
• Ernesto (footballer) (born 1979), Ernesto da Conceição Soares, Cape Verdean footballer

People

• Ernesto Abella, Filipino businessman, politician, and writer
• Ernesto Agard (born 1937), Panamanian basketball player
• Ernesto Aguero (born 1969), Cuban weightlifter
• Ernesto Alonso (1917–2007), Mexican actor, director, cinematographer, and producer
• Ernesto Amantegui Phumipha (born 1990), Thai footballer
• Ernesto Basile (1857–1932), Italian architect
• Ernesto Cesàro (1859–1906), Italian mathematician
• Ernesto De Curtis (1875–1937), Italian composer
• Ernesto Farías (born 1980), Argentine footballer
• Ernesto Figueiredo (born 1937), also known as "Ernesto", Portuguese footballer
• Ernesto García (1884-1955), Mexican soldier and politician
• Ernesto Guevara de la Serna (1928–1967), also known as "El Che" or "Che Guevara"
• Ernesto Geisel (1908–1996), Brazilian president
• Ernesto Kohler (1849–1907), flautist and composer
• Ernesto Lecuona (1895–1963), Cuban musician
• Ernesto Mejía (born 1985), Venezuelan professional baseball player
• Ernesto Maserati (1898–1975), Italian automotive engineer and racer
• Ernesto Michel (born 1970), Argentine basketball player
• Ernesto Miranda (1941–1976), American criminal
• Ernesto Nathan (1848–1921), English-Italian politician
• Ernesto Oglivie (born 1992), Panamaian basketball player
• Ernesto Pérez d'Angelo (1932–2013), Chilean paleontologist
• Ernesto Samper (born 1950), President of Colombia from 1994 to 1998
• Ernesto Ruffo Appel (born 1952), American-born Mexican politician
• Ernesto Rodríguez (born 1969), Argentine-Spanish volleyball player
• Ernesto Sabato (1911–2011), Argentine writer
• Ernesto Valverde (born 1964), Spanish footballer and coach
• Ernesto Zedillo Ponce de León (born 1951), President of Mexico from 1994 to 2000

Fictional characters

• a character in the Donizetti opera Don Pasquale
• a sphere-shaped robot in the American animated series OK K.O.! Let's Be Heroes
• a character called Uncle Ernesto in the Wizards of Waverly Place, a fantasy sitcom
• a character called Ernesto de la Cruz in the 2017 Pixar animated film Coco
• Ernesto (Better Call Saul), a fictional character in the TV series Better Call Saul
• Ernesto Almares, a character in Almost Paradise