Halon may refer to:
- Haloalkane, or halogenoalkane, a group of chemical compounds consisting of alkanes with linked halogens (in particular, bromine-containing haloalkanes)
- Halomethane compounds:
- Halon 10001 (iodomethane)
- Halon 1001 (bromomethane)
- Halon 1011 (bromochloromethane, CH<sub>2</sub>BrCl)
- Halon 104 (carbon tetrachloride)
- Halon 1103 (tribromofluoromethane)
- Halon 112 (dichlorofluoromethane)
- Halon 1201 (bromodifluoromethane)
- Halon 1202 (dibromodifluoromethane)
- Halon 1211 (bromochlorodifluoromethane, CF<sub>2</sub>ClBr)
- Halon 122 (dichlorodifluoromethane)
- Halon 1301 (bromotrifluoromethane, CBrF<sub>3</sub>)
- Halon 14 (tetrafluoromethane)
- Halon 2011B (1-bromo-2-chloroethane)
- Halon 2301 (1,1,1-trifluoro-2-bromoethane)
- Halon 2311 (1,1,1-trifluoro-2,2-chlorobromoethane, halothane)
- Halon 242 (1,2-dichlorotetrafluoroethane)
- Halon 2402 (dibromotetrafluoroethane, C<sub>2</sub>Br<sub>2</sub>F<sub>4</sub>)—used as a fire extinguisher
- Halon 2501 (pentafluorobromoethane)
- Halon 2600 (hexafluoroethane)
- Halon 4402 (1,1,2,2-tetrafluoro-1,4-dibromobutane)