The United States operates one of the most complex and expansive refining networks in the world, processing crude oil into the fuels and petrochemical feedstocks that power the economy. Understanding the scale and structure of this system requires a closer look at the number of active facilities and their distribution across the landscape. The current count of operating oil refineries sits just under 150, a significant reduction from historical peaks, reflecting decades of consolidation and market evolution.
The Current Count of Refining Capacity
As of the latest annual data, there are 128 operable petroleum refineries in the United States. This figure represents the facilities that processed crude oil or other feedstocks at least once during the year, capturing the active infrastructure rather than idle assets. These installations are not uniform; they vary dramatically in size, ranging from small coastal units processing a few thousand barrels per day to massive integrated complexes handling over 600,000 barrels daily. The concentration of this capacity is not random, but is tied to historical port access, crude oil production regions, and major consumption hubs.
Geographic Distribution and Strategic Location
The map of US refineries is divided into three primary coastal hubs: the Gulf Coast, the East Coast, and the West Coast. The Gulf Coast region, encompassing states like Texas and Louisiana, dominates with the highest concentration of large-scale facilities, leveraging proximity to both domestic offshore drilling and imported crude via deep-water ports. The East Coast, heavily reliant on imports, maintains a network of refineries strategically positioned near major population centers in states like Pennsylvania, New Jersey, and Delaware. The West Coast, including California, Washington, and Oregon, operates a smaller number of refineries, serving distinct regional markets with strict environmental specifications.
Gulf Coast: Home to the largest refineries, accounting for over 50% of total US refining capacity.
East Coast: A dense network of mid-sized refineries focused on gasoline and distillate production for Northeast markets.
West Coast: A mix of older, complex refineries designed to process heavy crude and meet stringent environmental standards.
Industry Consolidation and the Long-Term Trend
The number of 128 operable refineries stands in stark contrast to the post-World War II era, when more than 300 facilities dotted the country. This decline is not a sign of energy scarcity, but rather a result of intense industry consolidation. Mergers and acquisitions have driven smaller, less efficient units out of business, while larger players have expanded capacity at remaining sites to achieve economies of scale. Furthermore, the closure of refineries in regions like the Northeast and the permanent idling of units in states like Ohio reflect a permanent shift in the geographic center of gravity for US oil processing.
Refinery Runs and Utilization Rates
Quantity alone does not tell the full story; the activity level of these facilities is equally important. Refinery runs—the actual processing of crude oil—fluctuate with global oil prices, seasonal demand, and maintenance schedules. During periods of high demand, such as summer driving seasons, utilization rates can approach 95%, pushing the infrastructure to its limits. Conversely, during economic downturns or periods of low oil prices, refineries may run at reduced capacity or temporarily close, impacting the effective number of facilities contributing to supply. This operational flexibility is a key feature of the modern refining landscape.
The composition of crude oil feeds processed has also shifted, moving from light, sweet crude to heavier, sour crude from sources like Canadian oil sands and tight US formations. This transition requires significant capital investment to modify existing units or build new facilities capable of handling these more complex molecules. Consequently, the physical infrastructure of the 128 refineries is more advanced and capable than ever, even as the raw count has decreased over the past half-century.
