The Essar Refinery is an oil refinery at Vadinar, Gujarat, India. It is owned and operated by the Essar Oil. It is among the largest single location refineries in the world.
Constructon of the refinery started in 1996. The refinery project was delayed several times due to environmental concerns and financial problems, including initial cost over runs and a shortfall in equity contributions. In 1998, it was 60% complete in 1998 but was struck by a cyclone that caused considerable damage. Construction was restarted in 2005 and the refinery was completed in 2006. It costs US$2.14 billion.
The refinery has a capacity of . It is configured to produce Euro II and Euro III grades of petrol and diesel fuel. The refinery has built-in environment friendly technologies for pollution management and has also planted over one million trees to ensure a green corridor around the entire refinery complex. After its expansion it runs at a Nelson complexity index of 12.8. This means it will be able to refine all varieties of crude, producing Euro 5 grade fuels. The refinery employs over 1,000 personnel.