Duy () is a Vietnamese given name. Notable people with the name include:
Đái Duy Ban (born 1937), Vietnamese scientist Đào Duy Từ (1572–1634), Vietnamese poet Duy Tân (1899–1945), Emperor of Vietnam Phạm Duy (1921–2013), Vietnamese songwriter Tống Duy Tân (died 1892), Vietnamese revolutionary Đào Đức Duy (born 1995), Vietnamese creative director & designer Nguyễn Phong Hồng Duy (born 1996), Vietnamese footballer
See also Lê Duy Loan Pipo Nguyen-duy