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What does diesel cost in California today?

Fuel prices in the United States, from U.S. Energy Information Administration. An official figure as of 12 October 2026.

An official average or median published by a statistics office or regulator, not individual sales.

US$8.091 per gallon, average

In California the average retail price of on-highway diesel (all types) was $8.091 a gallon (about $2.137 a litre), taxes included, in the week of 12 October 2026. That is 0.1% higher than a week earlier ($8.082). That is 63.8% higher than a year earlier ($4.940 on 13 October 2025). Official average published by U.S. Energy Information Administration (EIA) for the week of 2026-10-12.

Reference period
the week of 2026-10-12 (the period the publisher states for this figure)
Kind of figure
An official average published by U.S. Energy Information Administration. It is passed on as published: no range of ours, and no count of records unless the publisher gives one.

Source: U.S. Energy Information Administration. Licence: Public domain. EIA states. Live answer: /api/v1/fuel?country=US&fuel=diesel&area=California

Where this comes from

Source
Gasoline and Diesel Fuel Update: weekly retail gasoline and on-highway diesel prices, published by U.S. Energy Information Administration (EIA)
Licence
Public domain. EIA states: "U.S. government publications are in the public domain and are not subject to copyright protection. You may use and/or distribute any of our data, files, databases, reports, graphs, charts, and other information products that are on our website or that you receive through our email distribution service. However, if you use or reproduce any of our information products, you should use an acknowledgment, which includes the publication date, such as: "Source: U.S. Energy Information Administration (Oct 2008)."" The EIA logo is a registered trademark and is not used here.
Attribution
Source: U.S. Energy Information Administration, Gasoline and Diesel Fuel Update (weekly retail gasoline and diesel prices), https://www.eia.gov/petroleum/gasdiesel/ . Public domain; EIA asks for an acknowledgment with the publication date. Prices are passed on as published; the US-dollars-per-litre figures and the changes on the week and the year are calculated by ProofPrice. ProofPrice is not endorsed by EIA.
Figures as of
. This page is rebuilt when the daily price library is deployed.
How fresh the source is
Weekly: EIA dates each figure to the Monday it describes and publishes it a day or two later (a day later after a federal holiday); our copy of EIA's history files is refreshed daily and every answer states its week
Limits
Weekly averages that EIA estimates from its survey of retail outlets, including federal, state and local taxes: not an individual station's price, not a range, and EIA does not say how many stations stand behind a figure. Gasoline is published for the United States, the PADD regions, nine states (CA, CO, FL, MA, MN, NY, OH, TX, WA) and ten cities (Boston, Chicago, Cleveland, Denver, Houston, Los Angeles, Miami, New York City, San Francisco, Seattle); diesel only for the United States, the PADD regions and California. Any other place is answered with the national average and says so. Regular, midgrade and premium are EIA's grades (all areas and formulations); EIA publishes no E10, E85, LPG or CNG prices. Prices are in US dollars per US gallon (3.785 litres). EIA warns that its estimates changed method on 14 May 2018 (gasoline) and 13 June 2022 (diesel), so older weeks are not strictly comparable.
Rule
A figure built from records is shown only when at least 5 records sit behind it; official statistics are shown as such, with their reference period. See how we earn trust and the method.

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Information, not a valuation or offer. Ranges describe past recorded prices.