Gillham may refer to:
Gillham, Arkansas, a town in Sevier County, Arkansas, United States Gillham Lake, a reservoir in Howard County and Polk County, Arkansas
People with the surname Art Gillham (1895–1961), American songwriter Jayson Gillham (born 1986), Australian classical pianist Mary Gillham (1921–2013), English naturalist and writer Nicholas Gillham (1932–2018), American geneticist Ron Gillham, American politician
See also Gillham Road, a street in Kansas, Missouri Gillham code