FULL LIST: Top 11 Largest Oil Refineries In The World.

Dangote Group has entered into a contract worth more than $350 million with India’s government-owned firm, Engineers India Limited (EIL).

The agreement was disclosed by EIL in a statement issued recently. Under the deal, EIL will act as the Project Management Consultant (PMC) as well as the Engineering, Procurement and Construction Management (EPCM) consultant for the refinery expansion project.

This mirrors the role the company played in the construction and delivery of the existing 650,000 barrels-per-day refinery, which was officially commissioned in 2024.

Under the new plan, the refinery’s capacity will be increased from 650,000 barrels per day to 1.4 million barrels per day.

The expansion will be achieved through the installation of a second processing train and will concentrate on the production of Euro VI–compliant fuels.

In addition to refining operations, the project also involves a substantial expansion of petrochemical production. Dangote intends to raise polypropylene output from 830,000 tonnes per annum to 2.4 million tonnes per annum by upgrading its current polypropylene facility, installing a new 1.2 million-tonne unit, and adding a 750,000-tonne UOP Oleflex unit to enhance propylene feedstock supply.

Here are the 11 largest oil refineries in the world

1. Dangote Refinery, Nigeria (2023, Expansion Ongoing)

Owner: Dangote Industries Limited

Commissioned in 2023, the Dangote Refinery, located in Lagos, is Africa’s most ambitious industrial undertaking and the newest facility on this list. Presently operating at 650,000 barrels per day, the refinery is undergoing expansion to reach 1.4 million barrels per day, a move expected to position Nigeria as a major global refining hub and drastically cut fuel imports across the continent.

2. Jamnagar Refinery, India (1999, Expanded 2008)

Owner: Reliance Industries Limited

The Jamnagar Refinery in Gujarat commenced operations in 1999 and was expanded in 2008. With a combined capacity of 1.24 million barrels per day, it remains the largest oil refinery complex in the world, renowned for its operational efficiency, advanced technology and strong export focus.

3. Ruwais Refinery, United Arab Emirates (1982, Expanded 2015)

Operator: Abu Dhabi National Oil Company (ADNOC)

Constructed in 1982 and extensively upgraded in 2015, the Ruwais Refinery now processes about 827,000 barrels per day. It ranks among the Middle East’s largest refining complexes and plays a key role in ADNOC’s downstream growth strategy.

4. Onsan Refinery, South Korea (1979)

Operator: S-Oil Corporation

Operational since 1979, the Onsan Refinery has a processing capacity of approximately 669,000 barrels per day. The facility is well known for innovation and the production of ultra-clean fuels that meet stringent global environmental standards.

5. Yeosu Refinery, South Korea (1969, Expanded 2021)

Operator: GS Caltex

Established in 1969, the Yeosu Refinery has a capacity of 840,000 barrels per day. Its 2021 expansion introduced advanced environmental technologies, strengthening its reputation as one of Asia’s most efficient and environmentally friendly refineries.

6. Ulsan Refinery, South Korea (1964)

Operator: SK Energy

Commissioned in 1964, the Ulsan Refinery is the largest in South Korea, with a processing capacity of 850,000 barrels per day. It is noted for its technological advancement and the wide range of fuels and petrochemical products it supplies to both domestic and regional markets.

7. Paraguaná Refining Complex, Venezuela (1950s)

Developed in the 1950s, the Paraguaná Refining Complex comprises three facilities — Amuay, Cardón, and Bajo Grande — with a combined capacity of 940,000 barrels per day. It remains one of the largest refining centres in the Western Hemisphere and a vital component of Venezuela’s oil sector.

8. Ras Tanura Refinery, Saudi Arabia (1945)

Operator: Saudi Aramco

In operation since 1945, the Ras Tanura Refinery is one of the world’s most strategically significant oil facilities. With a capacity of 550,000 barrels per day, it plays a central role in Saudi Aramco’s downstream operations and contributes to the global energy supply.

9. Galveston Bay Refinery, United States (1931, Expanded 2019)

Owner: Marathon Petroleum Corporation

Originally built in 1931, the Galveston Bay Refinery in Texas City has evolved into a major refining facility with a capacity of 631,000 barrels per day. Upgrades completed in 2019 improved its efficiency and sustainability, reinforcing its importance in both domestic and international markets.

10. Baton Rouge Refinery, United States (1909, Expanded 2023)

Owner: ExxonMobil

Founded in 1909, the Baton Rouge Refinery in Louisiana ranks among North America’s largest and most technologically advanced refineries. With a capacity of 520,000 barrels per day, continuous upgrades, including a 2023 expansion, have kept it central to the United States’ energy supply network.

11. Port Arthur Refinery, United States (1903, Rebuilt 2002)

Operator: Motiva Enterprises

Commissioned in 1903, the Port Arthur Refinery in Texas is one of the oldest operating refineries in the United States. Following extensive rebuilding and expansion in the early 2000s, it now processes about 600,000 barrels per day and serves as a key hub within the Gulf Coast energy system.