Geoffrey Walter Thom (28 April 1910 – 16 March 1973) was an Australian politician.
He was born in Geelong West to baker William Nathaniel Walter Hamlet Thom and Lily Potter.
He served in World War II, and on his return founded his own firm.
A member of the Liberal and Country Party, he served on Geelong West City Council from 1946 to 1958 and was mayor from 1955 to 1957.
In 1958 he was elected to the Victorian Legislative Council for South Western Province.