California Diesel Prices Hit Record High

Fuel costs soar as U.S.-Israel conflict with Iran drags on

Mar. 31, 2026 at 11:07pm

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The average price of a gallon of diesel in California reached an all-time high of $7.455 on Tuesday, surpassing the previous record of $7.012 set in June. The spike in fuel costs comes as the U.S.-Israel war on Iran enters its second month.

Why it matters

California is the largest state economy in the U.S., and diesel is a critical fuel for the state's transportation, logistics, and manufacturing sectors. The record-high prices will likely have a significant impact on businesses and consumers across the state.

The details

The new $7.455 per gallon diesel price in California represents a sharp increase from the previous record high set just last summer. Analysts attribute the latest surge to the ongoing U.S.-Israel military conflict with Iran, which has disrupted global oil supply and refining capacity.

  • The previous diesel price record in California was $7.012 per gallon, set in June 2026.
  • The new all-time high of $7.455 per gallon was reached on March 31, 2026.

The players

California

The largest state economy in the United States, with a GDP of over $3.1 trillion.

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The takeaway

The skyrocketing diesel prices in California underscore the broader economic impacts of the ongoing U.S.-Israel conflict with Iran, which has disrupted global energy markets and is now directly affecting businesses and consumers in the nation's largest state economy.