|Birth||April 18, 1731|
|Death||April 17, 1811 (Banff)|
Alexander Duff, 3rd Earl Fife (18 April 1731 – 17 April 1811) was a Scottish nobleman.
Duff was the son of William Duff, 1st Earl Fife and younger brother of James Duff, 2nd Earl Fife.
He briefly held the title Earl Fife, and was succeeded by his eldest son. His younger son was General Hon. Alexander Duff.
He died at Duff House, Banff.