Gandarias is a surname. Notable people with the surname include:
Andrés Gandarias (1943–2018), Spanish road bicycle racer José Gandarias (1904–1979), Spanish footballer, sailor and businessman Pedro Pascual Gandarias (1843–1901), Spanish industrialist and entrepreneur Juan Tomás Gandarias (1870–1940), Spanish businessman and politician, son of Pedro Pascual Pedro Gandarias (1901–1986), Spanish athlete, politician, and financier, son of Juan Tomás Sofía Gandarias (1957–2016), Spanish painter
See also Bouea macrophylla, commonly known as gandaria in English, a species of flowering plant native to Southeast Asia