Tribeca, originally written as TriBeCa, is a neighborhood in Lower Manhattan, New York City. Its name is a syllabic abbreviation of "Triangle Below Canal Street". The "triangle", or more accurately, a trapezoid, is bounded by Canal Street, West Street, Broadway, and Chambers Street. More recently, a common marketing tactic has been to extend Tribeca's southern boundary to either Vesey or Murray Streets to increase the appeal of property listings.

The neighborhood began as farmland, became residential in the early 19th century, then transitioned into a mercantile one centered on produce, dry goods, and textiles, before being colonized by artists and then actors, models, entrepreneurs and other celebrities. The neighborhood is home to the Tribeca Film Festival, which was created in response to the September 11 attacks, to reinvigorate the neighborhood and downtown after the destruction caused by the terrorist attacks.

Tribeca is part of Manhattan Community District 1 and its primary ZIP Codes are 10007 and 10013. It is patrolled by the 1st Precinct of the New York City Police Department.