The United States operates one of the world’s most complex networks of oil refineries, processing crude into gasoline, diesel, jet fuel, and countless petrochemical derivatives. Understanding how many refineries exist, where they are located, and how their capacity is distributed is essential for grasping the dynamics of energy security, fuel prices, and global markets.
Current Count of Operating Refineries
As of the latest data from the American Fuel & Petrochemical Manufacturers and the U.S. Energy Information Administration, there are 132 operational oil refineries across the United States. This number reflects a long-term trend of consolidation, as smaller facilities have closed or merged while larger complexes have expanded through upgrades and acquisitions. The total number has remained relatively stable over the past decade, but the geographic and operational profile of these refineries continues to evolve in response to regulation, market demand, and technological change.
Refinery Capacity and Utilization
Collectively, U.S. refineries process an average of approximately 18 million barrels of crude oil per day, giving the nation a nameplate capacity that accounts for roughly 20 percent of global refining throughput. This capacity, however, is not evenly distributed. Utilization rates fluctuate with seasonal demand, economic conditions, and maintenance cycles. During periods of high driving demand in the summer, utilization can approach peak levels, while in slower periods, some units may temporarily idle or run at reduced throughput to balance supply with market needs.
Geographic Distribution of Refineries
The concentration of refineries is heavily tilted toward regions with both strong industrial activity and significant access to crude supply and transportation infrastructure. The Gulf Coast states, including Texas, Louisiana, and Oklahoma, host the highest density of facilities, benefiting from proximity to major ports, pipelines, and international crude flows. Additional clusters exist in the Great Lakes region, the Mid-Atlantic, and California, each adapted to local feedstock preferences and regulatory environments.
Gulf Coast Dominance
Within the Gulf Coast, states such as Texas and Louisiana account for a substantial share of U.S. refining capacity. This region is particularly suited for processing a wide range of crude grades, from light sweet oils to heavier sour crude, thanks to advanced conversion units and extensive pipeline networks. Many of the largest refineries in the country operate in this area, enabling efficient export and domestic distribution.
Industry Trends and Modernization
Over the past decade, the U.S. refining sector has invested heavily in modernization to comply with stricter environmental standards and to meet changing consumer demand. Investments have focused on reducing sulfur content in fuels, improving energy efficiency, and upgrading units to process lower-quality crude while minimizing emissions. These efforts have allowed older refineries to remain competitive while integrating renewable fuels and alternative feedstocks into their operations.
Challenges Facing Refinery Operations
Despite a robust infrastructure, U.S. refineries face persistent challenges, including volatile crude prices, evolving environmental regulations, and competition from renewable energy sources. Extreme weather events, such as hurricanes along the Gulf Coast, can temporarily disrupt operations and ripple through national and global markets. Additionally, the transition toward lower-carbon energy systems is prompting some operators to reconsider long-term strategies, balancing traditional fuel demand with emerging opportunities in petrochemicals and biofuels.
