CSI: NY (Crime Scene Investigation: New York) is an American police procedural television series, which premiered on September 22, 2004 on CBS. The series was the second spin-off, indirectly, from the popular 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 currently 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. CSI: NY was produced in partnership with the Canadian media company Alliance Atlantis. The company dissolved after the third season in 2007. All production now is done under the purview of CBS Paramount Television.