how many refineries in california

As of early 2025, California has about 13 major operating oil refineries , with announced closures and conversions expected to reduce that number toward 11 refineries by the end of 2026.

Quick Scoop: What that number really means

• Currently operating (2025) : Multiple industry and energy-policy sources converge on the figure of 13 operating petroleum refineries in California at the start of 2025.

• Trend through 2026 : At least one refinery has already converted to renewable fuels and two more large refineries are slated to close or transition, pushing the count down to around 11 traditional petroleum refineries by late 2026.

• Long-term decline : California had over 20–50 refineries several decades ago, but environmental rules, market pressures, and conversions to renewable fuels have steadily cut that number down to the low teens today.

In practical terms: if you’re asking “how many refineries in California” right now, the best concise answer is about 13 active petroleum refineries, with a planned slide toward roughly 11 by the end of 2026.