About Sultanate of Oman Area 309,500 KM2 Capital Muscat Population (JUly/August 2008) 3,300,600 including foreigners and residents who account for 600,000 people Official Language Arabic (official language) English (commonly used) Religion Islam Natural Resources oil, natural gas, copper, fish, agriculture, tourism Local Time GMT +4 hours Currency Omani Rial, equivalent to 2.58 USD Length of Oman's Coas 3,165 KM Highest Mountain Peak 3,004 m (10,000 ft)  Jabal Shams Summer season May to September National Day November 18 Distance between cities Starting City: Destination City: Distance (kilometres): Distance (Miles):