Blowback may refer to:
- Blowback (intelligence)
- Blowback (firearms)
- Blowback (forensics), vacuum effect created in the barrel of a firearm when it is discharged
- Blowback (film) - a 2000 film
- Blowback (album) - a 2001 release by rapper Tricky
- Another term for backscatter (e-mail)
- An aerodynamic phenomenon affecting helicopter rotors also called flap back
- Blowback - a FlashForward episode