Dammam is the capital of the Eastern Province in Saudi Arabia. Dammam is the largest city in the Eastern Province; Dammam Port is one of the largest on the Persian Gulf. Its port for import-export traffic is second to Jeddah's port. It is served by the new King Fahd International Airport, which is about 20 km to the west, served by a three-lane highway. Other cities that surround Dammam are Khobar, which is a thriving modern economic hub, and Dhahran, which is the headquarters for Saudi Aramco, the largest oil company in the world.