The New York City Half Marathon is an annual half marathon road running race from Brooklyn's Prospect Park to Manhattan's Central Park via the Manhattan Bridge, held since 2006. It passes through or by Times Square, Grand Central, and both Grand Army Plazas. New York Road Runners (NYRR) administers the race.

A half marathon is a road running event of 21.0975 kilometres —half the distance of a marathon. It is common for a half marathon event to be held concurrently with a marathon or a 5K race, using almost the same course with a late start, an early finish or shortcuts. If finisher medals are awarded, the medal or ribbon may differ from those for the full marathon. The half marathon is also known as a 21K, 21.1K, or 13.1 miles, although these values are rounded and not formally correct.