A truck drives into a crowd in Lower Manhattan, New York City, killing eight people.

On October 31, 2017, Sayfullo Habibullaevic Saipov drove a rented pickup truck into cyclists and runners for about one mile of the Hudson River Park's bike path alongside West Street from Houston Street south to Chambers Street in Lower Manhattan, New York City. The vehicle-ramming attack killed eight people, six of whom were foreign tourists, and injured thirteen others.

Lower Manhattan, also known as Downtown Manhattan or Downtown New York City, is the southernmost part of the New York City borough of Manhattan. The area is the historical birthplace of New York City and in the 17th and 18th centuries composed the entirety of the city. Lower Manhattan serves as the seat of government of both Manhattan and the entire City of New York. Because there are no municipally defined boundaries for the area, a precise population cannot be quoted, but several sources have suggested that it was one of the fastest-growing locations in New York City between 2010 and 2020, related to the influx of young adults and significant development of new housing units.