Fob or FOB may refer to:
Entertainment
- FOB (play), a 1981 play by David Henry Hwang
- Fall Out Boy, an American rock band
Fashion and technology
- Fob pocket
- Key fob
- USB fob
- Watch fob
Medicine
- Fecal occult blood
- Follow-on biologics
Military
- Forward operating base
- Fractional Orbital Bombardment
Other uses
- Federation of Revolutionary Syndicalist Organizations of Brazil
- FOB (shipping) or Free on Board
- Federal Office Building (disambiguation)
- Fixed odds betting terminal
- Fob James (born 1934), former governor of Alabama
- Fresh off the boat