Saint Julia is the name of:

• Julia of Troyes (died 272), virgin and martyr
• St. Julia (died 303), Iberian-peninsula servant, victim in massacre that included religious leader Engratia
• Julia of Lisbon (died 303), early Christian saint and martyr
• Julia of Corsica (died c. 439), Roman religious leader
• Julie Billiart (1751–1816), French religious leader
• St. Julia (1865–1939), Austrian-born religious leader a.k.a. Ursula Ledóchowska