- Capital: Mascate
- Population: 4.527.000
- Surface: 309.500 km2
- Devise: le rial d’Oman (1 EUR=0,4304 OMR)
- Religion: Majorité Islam
- Appartient à: ACD, Ligue arabe, CCG, FMI, ONU
- Capital: Nouakchott
- Population: 4.614.974
- Surface: 1.030.700 km2
- Devise: l’ouguiya (1 EUR=44,1700 MRO)
- Religion: Majorité Islam
- Appartient à: ACP, UMA, Ligue arabe, FMI, ONU, UA