The cost of diesel in the United States has reached an unprecedented level, with the national average price hitting $6.4866 per gallon on September 19, 2026, according to AAA. This represents a significant increase of approximately 75% over the past year, compared to $3.7060 per gallon on the same date in 2025. The rapid escalation in diesel prices has been attributed to various factors, including supply chain disruptions and geopolitical tensions.
The recent surge in diesel prices has been particularly pronounced in the past month. According to GasBuddy, the national average price first breached the $6 per gallon mark on September 10, and has continued to rise since then. Industry experts point to several factors contributing to this increase, including the ongoing conflict between the US, Israel, and Iran, attacks on Russian oil infrastructure by Ukraine, and restrictions on fuel exports. These events have collectively led to a tightening of global diesel supplies.
Data from the Energy Information Administration (EIA) reveals a sharp increase in diesel prices over the past few weeks. The weekly average US diesel price rose from $5.599 per gallon on August 31 to $5.967 per gallon on September 7, and further to $6.285 per gallon on September 14. The situation is even more acute on the West Coast, where diesel prices reached $7.250 per gallon for the week ending September 14, with California recording an average price of $8.039 per gallon.
The global diesel market is already under significant strain, with the International Energy Agency (IEA) reporting a substantial decline in refined product exports from Gulf countries. According to the IEA's report on September 11, these exports decreased by nearly 60%, or 3.7 million barrels per day, compared to February levels. Additionally, diesel and gasoil exports from the Gulf and Russia fell by 1.6 million barrels per day in August compared to February.
The IEA emphasizes that diesel accounts for approximately 30% of global oil demand, and the current supply disruptions are having a pronounced impact on prices. In the US, diesel prices on the market exceeded $200 per barrel in early September, representing a nearly 94% increase from pre-war levels. This has significant implications for various industries, including transportation, agriculture, and manufacturing, which rely heavily on diesel fuel.
The current situation is further complicated by declining US diesel inventories. According to Reuters, US diesel stocks were 13% below their five-year average in early September. Refining margins have also reached record levels, indicating intense pressure on refined products. The IEA reports that observed global stocks decreased by 95 million barrels in August, with cumulative withdrawals since February totaling 507 million barrels.
The ongoing disruptions in the Middle East and Russia are expected to continue limiting the supply of refined products, maintaining upward pressure on diesel prices. As the situation continues to evolve, industries and consumers in the US and globally are likely to face increased costs and potential supply chain disruptions. The developments in the global diesel market are being closely monitored by industry stakeholders and policymakers.
Key points
- US diesel price reaches historic high of $6.4866 per gallon amid global supply chain disruptions.
- Global diesel market under strain due to decline in refined product exports from Gulf countries and Russia.
- US diesel inventories 13% below five-year average, contributing to price surge.
