Sidney H. Davidoff (July 18, 1939 – November 16, 2025) was an American lawyer and advisor who was one of 20 people on Richard Nixon's enemies list. Davidoff served as administrative assistant to John Lindsay, mayor of New York City, for seven years. After serving as his assistant, Davidoff founded his own firm and worked as a lawyer until his death.

Early life and education

Sidney H. Davidoff was born in New York City on July 18, 1939. His middle initial was not short for anything. Davidoff graduated with a bachelor's degree from City College of New York in 1960 and earned his J.D. from New York University in 1963. He was admitted to the New York Bar that year. During unrest in New York City following the Assassination of Martin Luther King Jr., Davidoff was among the mayoral aides working on the administration's response. He served on the board of governors of The New York Young Republican Club from 1967 to 1968.

Davidoff appeared as No. 12 on Richard Nixon's enemies list, which described him as "Lindsay's top personal aide: a first class S.O.B., wheeler-dealer and suspected bagman. Positive results would really shake the Lindsay camp and Lindsay's plans to capture youth vote. Davidoff in charge."

Davidoff worked on Lindsay's unsuccessful campaign in the 1972 Democratic Party presidential primaries.

Until his death, Davidoff was a senior partner at the lobbying firm Davidoff Hutcher & Citron LLP, which he founded in 1975. He later went on to form the New York Advocacy Association, a "lobbying group for lobbyists", designed to counter strict and complicated lobbying laws in the State of New York.

Davidoff was a Chubb Fellow at Yale University, as well as a lecturer to the Root-Tilden students at New York University School of Law. due to an infection while recovering from shoulder surgery.