Gamage is a Sinhalese or Welsh surname. Notable people with the surname include:

• Anoma Gamage, Sri Lankan politician
• Barbara Sidney, Countess of Leicester (1563–1621), Welsh heiress
• Chamila Gamage (born 1979), Sri Lankan cricketer
• Dharshana Gamage (born 1979), Sri Lankan cricketer
• Harry Gamage (1900–1994), American football coach
• Janak Gamage (born 1964), Sri Lankan cricketer
• K. A. Gamage (died 2009), Sri Lankan army officer
• Lahiru Gamage (born 1988), Sri Lankan cricketer
• Lal Dharmapriya Gamage, Sri Lankan architect and politician
• Lalith Gamage, Sri Lankan academic
• Lalith U. Gamage, Sri Lankan former provincial governor
• Piyasena Gamage (born 1949), Sri Lankan politician
• Saheli Rochana Gamage (born 1988), Sri Lankan singer
• Willy Gamage, Sri Lankan politician

• Gamages, London department store
• Gammage (disambiguation)
• All pages with titles containing Jayaratne