Jubail Industrial City, one of the world's largest industrial cities, was established in 1975 and is located in the Eastern Province of Saudi Arabia. It covers 1,016 square kilometers and includes industrial complexes and port facilities. It contributes to about 7% of Saudi Arabia's GDP. According to Benchmarkia's Industrial Park Ranking, Jubail Industrial City has been ranked as the top industrial park globally in terms of performance.

The city is home to the Middle East's largest and the world's fourth-largest petrochemical company, SABIC. It has the world's largest IWPP (Independent Water and Power Project), producing 2,743.6 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 Industrial Area.  The core of the new city, developed under the direction of two Saudi government agencies, the General Petroleum and Mineral Organization (PETROMIN) and the Saudi Basic Industries Corporation (SABIC), is composed of some 16 primary industries.

These industries include factories producing steel, gasoline, diesel fuel, petrochemicals, lubricating oil, and chemical fertilizers. In addition to these plants, secondary and support industries were provided for. The entire industrial zone covers about 51 square miles (132 square km). Housing for workers was separated from the industrial area by greenbelts irrigated with desalinated gulf water. Miles of module paths and cooling-water canals were built throughout the city. The new industrial and residential areas were named Madīnat al Jubayl aṣ Ṣinā`īyah (Jubail Industrial City).

According to en.wikipedia.org