King Abdul Aziz Port, also known as Dammam Port, is a port in the city of Dammam, Saudi Arabia. It is the largest port in the Persian Gulf, and the third largest and third busiest port in the Middle East and North Africa (MENA) region, after the Jeddah Islamic Port. King Abdul Aziz Port is a major export center for the oil industry, and also a key distribution center for major landlocked cities in the country, particularly the capital cities of provinces, such as Riyadh which is linked to Dammam by a railway line.