Throggs Neck (also known as Throgs Neck) is a narrow spit of land in the southeastern portion of the borough of the Bronx in New York City. It demarcates the passage between the East River (an estuary), and Long Island Sound. "Throggs Neck" is also the name of the neighborhood of the peninsula, bounded on the north by East Tremont Avenue and Baisley Avenue, on the west by Westchester Creek, and on the other sides by the River and the Sound. Throggs Neck was largely exempt from the severe urban decay that affected much of the Bronx in the 1970s.

Throggs Neck is at the northern approach to the Throgs Neck Bridge, which connects the Bronx with the neighborhood of Bay Terrace in the borough of Queens on Long Island. The Throgs Neck Lighthouse formerly stood at its southern tip. Historically, the correct spelling is with two Gs, and while NYC Parks Commissioner and Triborough Bridge and Tunnel Authority Chairman Robert Moses officially shortened it to one G after deciding that two would not fit on many of the street signs, long-time residents continue to recognize the traditional spelling