Samuel Freeman Hersey (April 12, 1812 – February 3, 1875) was a politician and "lumber baron" from the U.S. state of Maine.

He was elected as a member of the Maine House of Representatives, and was a delegate to the 1860 Republican National Convention which nominated Abraham Lincoln.

Hersey was a close friend and patron of Bangor politician and Abraham Lincoln's Vice President Hannibal Hamlin, which is probably why he served on the Republican National Committee 1864–1868.

During the Northeastern Boundary Dispute of 1839–42 he served as Commanding Colonel of the newly formed 6th Regiment of the 1st Brigade and 3rd Division which included the rapidly growing communities on the east of the Penobscot River north of Milford to the Saint John River.

When The Aroostook was organized into a County in 1840 and the 9th Division of the Maine State Militia was formed, he joined Colonel John Carpenter of Lincoln as the first commanders.