Benjamin Pierce (December 25, 1757 – April 1, 1839) was an American politician who twice served as the governor of New Hampshire from 1827 to 1828 and from 1829 to 1830. Pierce fought during the American Revolutionary War before becoming a Democratic-Republican Party politician. He was the father of Franklin Pierce, the 14th president of the United States.

Benjamin Pierce was born in Chelmsford in the Province of Massachusetts Bay, the son of Benjamin and Elizabeth Merrill Pierce, as well as a direct descendant of Thomas Pierce (1618–1683), the grandson of Sir Richard Carew, who was born in Norwich, Norfolk, England and settled in the Massachusetts Bay Colony.

Pierce was a distinguished veteran of the Revolutionary War, serving in the 16th Continental Regiment, which was later renamed the 8th Massachusetts Regiment. He was present at the Battle of Bunker Hill. He was promoted to Ensign in the 1st Massachusetts Regiment for bravery during the Saratoga campaign.

Following the war, he moved to Hillsborough, New Hampshire, where he built the Pierce family home, and was assigned the task of forming the Hillsborough County militia. In 1805, he was promoted to brigadier general and assigned command of the New Hampshire state militia.

Prior to becoming governor, Pierce served in the New Hampshire House of Representatives from 1786 to 1788 and twice as Sheriff of Hillsborough County, from 1809 to 1812 and later from 1818 to 1827.

He was a delegate to the state Constitutional Convention in September 1791 and a member of the Governor's Council from 1803 to 1809 and again in 1814.

Pierce served his first term as governor from 1827 to 1828, and later served from 1829 to 1830.

Pierce's father died when he was six. He subsequently worked on his uncle's farm until enlisting in Ebenezer Bridge's Massachusetts regiment on April 26, 1775.