CSI: NY (Crime Scene Investigation: New York) is an American police procedural television series, which premiered on September 22, 2004. The series was the second spin-off, indirectly, from the popular CBS show, CSI: Crime Scene Investigation, and directly from CSI: Miami, during an episode of which several of the CSI: NY characters made their first appearance. The show airs Wednesdays at 10PM ET/PT on CBS.

The show trails the investigations of a team of New York City Police Department forensic scientists as they unveil the circumstances behind mysterious and unusual deaths and other crimes.