Barnes may refer to the following:
- Barnes (Day 1) - character during Day 1 portrayed by Pete Antico.
- Barnes (Day 5) - a CTU SWAT agent given orders by Curtis Manning during Day 5
- Harris Barnes - alias used by Habib Marwan during Day 4.
- Harry Barnes - President of the United States during Veto Power and Cat's Claw.
- Juliette Barnes - First Lady of the United States and Harry Barnes' wife during Veto Power.