Ferdinand A. Eberstadt (June 19, 1890 – November 11, 1969) was an American lawyer, investment banker, and an important policy advisor to the United States government who was instrumental in the creation of the National Security Council and the Central Intelligence Agency.

[2] After serving overseas in World War I, he set up a law practice in New York City, providing legal services to members of the Wall Street financial community.

Recognized for his negotiating skills in financial matters, Eberstadt was invited by the Hoover administration to participate in the 1929 World War I reparations conference in Paris as an assistant to Owen D. Young.

Eberstadt maintained a residence in New York City but in 1927 purchased an 80-acre (320,000 m2) estate on the peninsula at Lloyd's Neck on the north shore of Long Island called Target Rock Farm.

The donated land was to be the formal legal basis that halted the proposed construction of a nuclear power plant by the Long Island Lighting Company in 1970.