George Sylvester Tiffany (1805–1856) was a Canadian lawyer and politician.
Tiffany was educated at Dartmouth College, New Hampshire, prior to opening a large practice in Hamilton on Hughson Street S. In 1845 he became a director of the Great Western Railway, whose president was Sir Allan MacNab.
He borrowed heavily from his uncle Oliver's estate to finance speculation in real estate related to the railway line and, along with MacNab, profited by buying land along the waterfront where the Great Western yards were established.
He was commissioned a lieutenant in the 3rd Regiment of Gore Militia 13 December 1838.
In 1843 he was a member of the board of examiners appointed by Hamilton's board of police to find suitable teachers and temporary schoolhouses in the town's five common school districts, in accordance with the requirement of the Common School Act of 1843.