Gilliland is a surname. Notable people with the surname include:
Alexis A. Gilliland (born 1931), American science fiction writer and cartoonistAllan Gilliland (born 1965), Canadian composerButch Gilliland (born 1958), American race car driverCharles L. Gilliland (1933–1951), American soldier and Medal of Honor recipientDavid Gilliland (born 1976), American race car driverEdwin R. Gilliland (1909–1973), American chemical engineerJohn Gilliland (1935–1998), American radio broadcaster and documentarianKaitlyn Gilliland, New York City Ballet dancerMargaret Sylvia Gilliland (1917–), Australian biochemistRichard Gilliland (born 1950), American television and movie actorThomas Gilliland (fl.1804-1816), English theatre critic