Dibba (Arabic: دبا; Portuguese: Doba), sometimes spelled Diba or Daba, is a coastal region at the northern tip of the eastern Arabian peninsula on the Gulf of Oman. It is politically divided into three segments:

• Dibba Al-Fujairah (دبا الفجيرة), ruled by the Emirate of Fujairah, UAE
• Dibba Al-Hisn (دبا الحصن), ruled by the Emirate of Sharjah, UAE
• Dibba Al-Baya (دبا البيعة), ruled by the Governorate of Musandam, Oman