Fek or FEK may refer to:

• Fek, Iran
• Fek, Nepal
• Feck, a vernacular term in Hiberno-English, Scots and Middle English
• Ferkessédougou Airport, in the Ivory Coast
• Government Gazette (Greece)

• Umbra (bionicle)
• Umbraco
• Umbra (company)
• Umbra Concept Store
• Umbraculida
• Umbraculoidea
• Umbraculum (genus)
• Umbraculum sinicum
• Umbrage
• Umbral (disambiguation)
• Umbra limi
• Umbral operator
• Umbral Operator
• Umbraphile
• Umbraphiles
• Umbra pygmaea
• Umbraresti
• Umbraresti-Deal
• Umbraresti Deal
• Umbra software
• Umbravirus
• Umbrella acacia
• Umbrella Apisto
• Umbrella Beach
• Umbrella Biohazard Countermeasure Service