New York Fashion Week, recently branded Mercedes-Benz Fashion Week, is a semiannual fashion week held in New York City. It is one of four major fashion weeks in the fashion industry. The first NY Fashion Week, then called Press Week, was the world's first organized fashion week back in 1943.

Designers produce fashion shows to show off their latest collections. The most recent show was in September 2009 for Spring 2010 Fashion Week. The shows are currently sponsored by Mercedes-Benz and therefore referred to as Mercedes-Benz Fashion Week. In the past, they have been referred to by other sponsors such as Olympus Fashion Week.

New York City in Bryant Park, an 8-acre park is converted to a temporary fashion arena with tents. The Fashion Week tents are huge, air-conditioned and contain several venues for the designers to show their collections. Individual venues come complete with runway, seating for attendees, backstage areas, lighting and sound. Some fashion designers choose to have their collections shown in showrooms or other off-site venues during the week.

NY Fashion Week is held twice a year; fall shows are held the preceding winter in February and spring shows are held the preceding late summer in September. Fashion Week is produced by 7th on Sixth, which was originally formed by the Council of Fashion Designers of America in 1993, then acquired by IMG, which is a lifestyle and sports marketing and management firm.