NFN Dempsey
- Full Name: NFN Dempsey
- Species: Human
- Gender: Male
- Wife: Margo Dempsey ( - 2385)
- By November 2385: Officer, Federation Security Agency (TNG Novel: Available Light)
- Death: November 2385 (TNG Novel: Available Light)
- Killed in shuttlecraft crash engineered by Uraei for uncertain reasons (TNG Novel: Available Light)