Jubail (, "Al Jubayl") is a city in the Eastern province on the Persian Gulf coast of Saudi Arabia, with a total population of 684,531 as of 2021. It is home to the largest industrial city in the world. It is also home to the Middle East's largest and world's fourth largest petrochemical company SABIC. It has the world's largest IWPP (Independent Water and Power Project) producing 2743.6 MW of electricity and 800,000 m3 of water daily. Jubail comprises the Old Town of Al Jubail (Jubail Balad), which was a small fishing village until 1975 and the new industrial area. Jubail Industrial City is the largest civil engineering project in the world today.