Gas prices across the United States have surged to their highest levels in four years, with the national average reaching $4.125 per gallon on April 13, 2026, according to AAA data — a direct consequence of the ongoing U.S.-Iran conflict and the escalating pressure on global oil supplies running through the Strait of Hormuz. Oil prices topped $103 per barrel on Monday morning, up nearly $39 from one year ago, as the Trump administration announced a full naval blockade of Iranian oil shipments following the collapse of peace talks in Pakistan over the weekend.
The price surge reflects the interconnected nature of global energy markets. While the United States produces much of its own oil, the global benchmark price for crude — which determines what refiners pay and, ultimately, what consumers pay at the pump — is highly sensitive to any disruption in supply from the Middle East. With Iranian ports and coastal shipping now subject to U.S. naval enforcement, traders are pricing in sustained uncertainty.
In Spartanburg, the numbers are real and visible at every gas station along I-85 and I-26. The Spartanburg metro area averaged $3.82 per gallon for regular unleaded as of Sunday, according to AAA — up from $2.80 a year ago, a roughly 37% increase in twelve months. Diesel prices in the Spartanburg metro have climbed even faster, hitting $5.74 per gallon, near a record high for the region and up dramatically from the $3.23 average just a month prior. South Carolina as a whole saw diesel prices increase by 62.6% year over year as of April 1, the third-highest rate of diesel price increases in the nation, according to SmartAsset data.
The political dimension of the price surge is already drawing attention in Columbia and Washington. The Trump administration has argued that cutting off Iranian oil revenue will advance national security goals and ultimately stabilize energy markets. Spartanburg County residents who commute long distances — whether to the BMW plant in Greer, Spartanburg Regional Healthcare System, or the cluster of manufacturing facilities along the I-85 corridor — are among those most affected by higher fuel costs, as the county's geography requires car travel for the vast majority of residents.
The county's logistics and freight sector is also watching closely. Spartanburg County is a major distribution hub, with significant trucking traffic moving through its industrial parks and along its highway corridors. Diesel at $5.74 per gallon adds materially to the cost of moving goods, and those costs are typically passed on to businesses and consumers through fuel surcharges.
What's Happening
When and where is this happening?
Gas prices have been rising since the U.S.-Iran conflict began earlier in 2026 and accelerated sharply over the past week following the collapse of peace talks and the announcement of a Strait of Hormuz naval blockade on April 13, 2026. The increases are visible at Spartanburg-area gas stations along I-85, I-26, and throughout the county.
Who is involved?
The price increases are driven by U.S. and Iranian government actions. President Trump ordered the Strait of Hormuz blockade after peace talks led by Vice President J.D. Vance failed. The impact is being felt by every Spartanburg County resident who drives or relies on goods transported by truck.
Why does this matter to Spartanburg?
Spartanburg County is highly car-dependent, and its economy relies on freight movement through its manufacturing corridor. Regular gas at $3.82 per gallon and diesel near $5.74 represent significant increases compared to twelve months ago and add directly to household and business costs.
What should residents know?
AAA and fuel analysts advise against panic buying, as there is no supply shortage. Shopping around among stations can still yield meaningful savings — the gap between the cheapest and most expensive stations in South Carolina has recently exceeded $1.20 per gallon, according to GasBuddy data.
What happens next?
The U.S.-Iran ceasefire is set to expire April 22. Whether the blockade continues, is lifted, or escalates into renewed hostilities will be the primary driver of fuel prices over the next two weeks. The Trump administration has said it is open to resumed negotiations if Iran commits to abandoning its nuclear program.
