The Eastern Province (Arabic: المنطقة الشرقية, romanized: al-Mintaqah ash-Sharqīyah), also known as the Eastern Region, is a province in Saudi Arabia. It is the nation's largest province by area and the third most populous after Riyadh and Mecca provinces. As of 2022, the population is 5,125,254. Its name reflects its location in the eastern part of the country.
More than a third of the population is concentrated in the Dammam metropolitan area. With an estimated population of 1.53 million as of 2022, Dammam, the seat of the province, is the fourth most populous city in the kingdom. Other populous cities in the province include Qatif, Hofuf, Hafar al-Batin, Jubail and Khobar. The region is extremely popular among tourists for its beaches on the Persian Gulf (also known as the Arabian Gulf) and proximity to the other countries of the eastern Arab world, such as the United Arab Emirates, Qatar and Bahrain, with the latter being linked to the province via the 25 km (15 mi) long King Fahd Causeway. The Province also shares a border with Oman, Yemen, Kuwait and Iraq. The province is bordered to the west, from north to south, by the provinces of the Northern Borders, Hail, Al-Qassim, Riyadh and Najran.