- Capital: Muscat
- Population: 4,527,000
- Surface Area: 309,500 km2
- Currency: Omani Rials (1 EUR=0.4126 OMR)
- Religion: Mostly Islam
- Belongs to: ACD, Arab League, GCC, IMF, UN
- Capital: Riyadh
- Population: 32,175,000
- Surface Area: 2,149,690 km2
- Currency: Saudi riyals (1 EUR=4.0245 SAR)
- Religion: Mostly Islam
- Belongs to: ACD, Arab League, G20, GCC, IMF, UN, OPEC