Abraham Woodhull (October 7, 1750January 23, 1826) was a leading member of the American Culper Spy Ring in New York City and Setauket, New York during the American Revolution. He used the alias "Samuel Culper", later "Samuel Culper, Sr.," 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 and operating out of New York, from October 1778 until the end of the American Revolutionary War. After the United States gained independence, Woodhull served as a magistrate and a judge in Suffolk County, New York.