SoCal Diesel Prices Surge Amid Iran Conflict, Threatening Supply Chain

Southern California diesel prices are rapidly increasing following recent U.S. And Israeli strikes in Iran, impacting truckers and potentially foreshadowing broader economic consequences. The surge in diesel costs, which powers much of the U.S. Economy, is already being felt by those in the transportation industry and could soon affect consumers through increased costs for goods and services.

Diesel Price Increases Across Southern California

As of Wednesday, March 19, 2026, the average diesel price in Los Angeles County reached $6.54 per gallon, while Orange County averaged $6.52 and San Bernardino County $6.50, according to AAA. This marks the second time in history diesel prices have surpassed $5 a gallon nationwide. [Source: ABC7]

Impact on Truckers and the Economy

Truck drivers are already experiencing the financial strain of higher diesel prices. Luis Bonilla, a truck driver, expressed concern about the unpredictable costs, stating, “You never know how much you’re going to be paying, your next stop, when you arrive to the truck stop to fill up your tank. Hopefully this situation is going to end as soon as possible.” [Source: ABC7]

Experts warn that diesel fuels a significant portion of the U.S. Economy, transporting goods to stores, warehouses, and airports. Patrick De Haan, head of petroleum analysis for GasBuddy, noted that the increased cost of diesel could impact air travel and the price of goods at the grocery store, hardware store, and other retailers. [Source: ABC7]

Another truck driver, Portillo, emphasized the widespread consequences, stating, “All of the big diesel trucks, that’s how everything gets moved around in the U.S. So, yea. If the diesel goes up, the cost of moving everything is going to go up.” [Source: ABC7]

Potential Supply Chain Disruptions

De Haan cautioned that the current rate of increase is unprecedented and that the increased cost of diesel could begin affecting the supply chain within one to two months. [Source: ABC7] He likewise indicated that the situation in the Strait of Hormuz needs to improve to prevent Los Angeles from setting a record-high diesel price in the coming weeks. [Source: ABC7]

Gasoline Prices Also Affected

While diesel is experiencing the most dramatic increases, gasoline prices are also climbing. The average price of a gallon of self-serve regular gasoline in Los Angeles County rose to $4.88 on Thursday, March 6, 2026, the highest level since November 10, 2025. Orange County saw an increase to $4.841, also the highest since November 10, 2025. [Source: Fox LA] The California state average is $4.810, while the national average is $3.251. [Source: Fox LA]

The national average price rose 5.3 cents, its highest amount since September 11, 2024. [Source: Fox LA]