Abiel Foster (8 August 1735 - 6 February 1806) was an American clergyman and statesman from Canterbury, New Hampshire. He represented New Hampshire in the Continental Congress and the U.S. Congress.
Foster was born in Massachusetts in 1735. He was graduated from Harvard College in 1756 and went on to study theology. His ordination as a pastor in Canterbury was in 1761, and he served in that capacity until 1779. From 1783 to 1785, Foster was a delegate for New Hampshire to the Continental Congress. In 1789, he became a member of the First United States Congress as a Representative from New Hampshire. He returned to the state legislature in 1791, serving there until 1794 when he was elected again to the U.S. House of Representatives. He served there from 1795 to 1803.
Foster died in Canterbury on February 6, 1806, and is buried in the Center Cemetery there.