Grattan may refer to:
People Given name Grattan Kerans (1941–2019), American politician from Oregon Grattan O'Leary (1888–1976), journalist, publisher and member of the Canadian Senate Grattan H. Wheeler (1783–1852), U.S. Representative from New York
Surname C. Hartley Grattan (1902–1980), American economic analyst and historian Harry Grattan (c. 1867–1951), British stage actor, singer, dancer and writer Henry Grattan (1746–1820), Irish politician Henry Grattan (junior) (1789–1859), Irish politician Jennifer Grattan (born 1987), Canadian professional wrestler with the stage name "Portia Perez" John Grattan (naturalist) (1800–1871), Irish naturalist and anthropologist Michelle Grattan (born 1944), Australian journalist Thomas Colley Grattan (1792–1864), Irish writer William J. Grattan (1876–1938), New York politician
Places United States Grattan Township, Michigan Grattan Township, Minnesota Grattan Township, Holt County, Nebraska
Other Grattan Bridge, a road bridge spanning the River Liffey in Dublin, Ireland Grattan Institute, an Australian public-policy think tank Grattan massacre, 1854 incident between the U.S. army and the Brulé Lakota (Sioux) Grattan plc, a British catalogue clothing retailer Grattan Stadium, sponsored name of Odsal Stadium, home of Bradford Bulls Rugby League Football Club, in Bradford, England