Waccabuc is a hamlet and lake in the town of Lewisboro, Westchester County, New York, United States.

Waccabuc is considered "New York's Secret Suburb" and is home to a "collection of privacy-loving C.E.O.s and bright stars in other firmaments," according to an Upstart Business Journal article about the tremendous number of notable residents in a hamlet of just a few hundred people.

[5] On July 1, 1956, Marilyn Monroe wed Arthur Miller in a Jewish ceremony at a private house in Waccabuc.

[12] Real estate brokers note that listings in Waccabuc priced at $600,000 could be teardown projects,[2] despite being more than $100,000 above the median home value of the country overall.

[8] A 2005 NYT story on the hamlet captured the social function of the Post Office and the locals' efforts to preserve and maintain it.