- Gaillon-sur-montcient (78250)
- Galluis (78490)
- Gambais (78950)
- Gambaiseuil (78490)
- Garancieres (78890)
- Gargenville (78440)
- Gazeran (78125)
- Gommecourt (78270)
- Goupillieres (78770)
- Goussonville (78930)
- Grandchamp (78113)
- Gressey (78550)
- Grosrouvre (78490)
- Guernes (78520)
- Guerville (78930)
- Guitrancourt (78440)
- Guyancourt (78280)
- Hardricourt (78250)
- Hargeville (78790)
- Herbeville (78580)
- Hermeray (78125)
- Houdan (78550)
- Houilles (78800)
- Issou (78440)