Diesel gas hits $9.999 per gallon in these two Bay Area cities

Published September 10, 2026 3:17 PM PDT

Gas prices continue to rise in California, with the average price of regular gasoline over $6 a gallon in many Bay Area counties. Meanwhile, new data shows diesel prices have hit nearly $10 a gallon at some locations in the state – including two cities in the Bay Area. 

$9.999 per gallon at some Bay Area gas stations

What we know:

GasBuddy Head of Petroleum Analysis Patrick De Haan confirmed that six stations in California are selling diesel at the dispensers' highest possible price of $9.999 a gallon.

GasBuddy did not identify the individual stations but said the locations are in Santa Clara, Serra Mesa, San Jose, and Paso Robles.

Diesel prices soar 

According to AAA, the current average price for diesel is $7.9114 in California and $5.9773 nationally. 

According to GasBuddy, the national average of $6 a gallon for diesel is a level that has never been reached before. 

"Diesel is the fuel that moves the economy, powering the freight trucks, trains, agricultural equipment, and construction machinery behind nearly everything Americans buy. That means its impact reaches far beyond the transportation sector. As diesel climbs, higher supply chain costs work their way into the price of groceries, household goods, deliveries, and countless other products families rely on every day, even for households that never fuel a diesel vehicle," De Haan said in a statement

At $6 per gallon, diesel is now up roughly $2.30 from a year ago, when the national average was near $3.70.

Bay Area average gas prices

The average price for a regular gallon of gas is more than $6 in several Bay Area counties, according to data from AAA, as of Sept. 10.

By the numbers:

  • San Francisco County: $5.966
  • Santa Clara County: $5.879
  • Contra Costa County: 5.926
  • Marin County: $6.043
  • Sonoma County: $6.100
  • Napa County: $6.039
  • Solano County: 5.836
  • San Mateo County: $6.063
  • Alameda County: $5.959

Southern California average gas prices

The average price of regular gasoline in Los Angeles County is $5.944 a gallon, marking the 23rd consecutive day of increases. The average has risen 30.2 cents over the past 23 days and is $1.264 higher than it was one year ago. Since Feb. 28, the average price has increased $1.25.

The average price of regular gasoline in Orange County is $5.923 a gallon, also marking the 23rd consecutive day of increases. The average has risen 34.8 cents over the past 23 days and is $1.263 higher than it was one year ago.

National gas prices

The national average also continues to climb.

The average price rose 5.3 cents Thursday to $4.277, marking its 10th increase in 11 days. It's now 13.4 cents higher than one week ago, 26.8 cents higher than one month ago and $1.084 higher than one year ago.

GasBuddy said the national average is at its highest level this late in the calendar year.

The Source: Information for this story came from GasBuddy and AAA. The story was originally reported by FOX 11 Los Angeles and edited by KTVU FOX 2 to include Bay Area gas prices.

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