Abraham Woodhull (October 7, 1750 – January 23, 1826) was a leading member of the American Culper Spy Ring in New York City and Setauket, New York during the American Revolutionary War.
He used the alias "Samuel Culper" (later "Samuel Culper Sr.") which was a play on Culpeper County, Virginia suggested by George Washington.
The Culper Ring was a successful operation which provided Washington with valuable information on the British Army headquartered in New York from October 1778 until the end of the war.
After the United States gained independence, Woodhull served as a magistrate, as his father did before him, and he served as a judge in Suffolk County, New York.