NCIS

This is a disambiguation page; that is, one that points to other pages that might otherwise have the same name.

NCIS may refer to:

• The NCIS series itself.
• Naval Criminal Investigative Service, the armed federal agency that constitutes the backbone of the series.
• "National Crop Insurance Service", an international organization mentioned in the Season One finale episode, Reveille (episode) and at later times hinted about (e.g., "Meat inspectors").