Ugarte or uharte is a Basque word meaning "island". It can also be spelt Huarte or Hugarte in Spanish. Notable people with the surname include:

• Adriana Ugarte (born 1985), Spanish actress
• Agustín Jerónimo de Iturbide y Huarte (1807–1866), Prince Imperial of Mexico
• Alfonso Ugarte (1847–1880), Peruvian military commander
• Alfredo Ugarte, Chilean hurdler
• Alirio Ugarte Pelayo (1923–1966), Venezuelan politician
• Ana Carolina Ugarte (born 1992), Venezuelan model and beauty pageant titleholder
• Andoni Ugarte (born 1995), Spanish footballer
• Augusto José Ramón Pinochet Ugarte (1915–2006), Chilean military officer and dictator
• Francisco Ugarte (footballer, born 1959), Chilean footballer
• Francisco Ugarte (footballer, born 1986), German-Chilean footballer
• Gloria Ugarte, Argentinian actress
• Jose de la Torre Ugarte (1798–1878), Peruvian lyricist
• José Humberto Ugarte (born 1980), Costa Rican footballer
• José Luis Ugarte (1928–2008), Spanish sailor
• John Huarte (born 1944), American football quarterback
• Juan de Ugarte (1662–1730), Jesuit missionary and explorer
• Juan Huarte de San Juan (c. 1530–1592), Spanish physician and psychologist
• Juan Ugarte (born 1982), Spanish footballer
• Juan Vicente Ugarte del Pino (1923–2015), Peruvian historian and jurist
• Julio Ugarte y Ugarte (1890–1949), Peruvian writer
• Manuel Ugarte (footballer) (born 2001), Uruguayan footballer
• Manuel Ugarte (writer) (1875–1951), Argentinian author
• Manuel Ugarte Soto (born 1940), Chilean police officer and lawyer
• Marcelino Ugarte (1855–1929), Argentinian jurist and politician
• María Dolores Ugarte, Spanish statistician
• María Ugarte (1914–2011), Spanish-Dominican journalist and writer
• Nicolás Armentia Ugarte (1845–1909), Spanish missionary and bishop
• Óscar Ugarte (born 1944), Peruvian physician and politician
• Paula Ugarte (born 1987), Argentinian footballer
• Pedro Ugarte (born 1963), Spanish writer and columnist
• Poly Ugarte (born 1959), Ecuadorian activist, lawyer, and politician
• Renzo Pi Hugarte (1934–2012), Uruguayan anthropologist
• Salvador de Iturbide y Huarte (1820–1856), prince of Mexico
• Sebastian Ugarte, Filipino footballer and sports executive
• Víctor Ugarte (1926–1995), Bolivian footballer
• Xóchitl Ugarte (born 1979), Mexican voice actress
• Zoila Ugarte de Landívar (1864–1969), Ecuadorian writer and suffragist

Fictional characters

• Guillermo Ugarte, a character in the film Casablanca