Marial is a Spanish and South Sudanese surname. Notable people with the surname include:
Augustino Marial, South Sudanese Olympic boxer Chol Marial (born 1999), South Sudanese college basketball player Guor Marial (born 1984), South Sudanese Olympic track and field athlete Juli Marial (1885-1963), Spanish president and player of FC Barcelona Juli Marial Tey (1853–1929), Spanish architect and politician Melcior Marial (1887–?), Spanish engineer and politician Barnaba Marial Benjamin (born 1957), South Sudanese politician