| Rank | County | Production Period | Oil Production |
|---|---|---|---|
| #2 | Los Angeles County, CA | Jul 2026 | 521.8k BBLs |
| #3 | Ventura County, CA | Jul 2026 | 357.5k BBLs |
| #4 | Fresno County, CA | Jul 2026 | 302.5k BBLs |
| #5 | Monterey County, CA | Jul 2026 | 155.8k BBLs |
| #6 | Santa Barbara County, CA | Jul 2026 | 136.8k BBLs |
| #7 | Orange County, CA | Jul 2026 | 134.1k BBLs |
| #8 | San Luis Obispo County, CA | Jul 2026 | 42.1k BBLs |
| #9 | Kings County, CA | Jul 2026 | 3.6k BBLs |
| #10 | Contra Costa County, CA | Jul 2026 | 1.2k BBLs |
| #11 | Tulare County, CA | Jul 2026 | 758 BBLs |
| #12 | San Benito County, CA | Jul 2026 | 674 BBLs |
| #13 | San Bernardino County, CA | Jul 2026 | 442 BBLs |
| Rank | County | Production Period | Gas Production |
|---|---|---|---|
| #11 | Santa Barbara County, CA | Jul 2026 | 115.4k MCF |
| #12 | Glenn County, CA | Jul 2026 | 102k MCF |
| #13 | Sacramento County, CA | Jul 2026 | 82.1k MCF |
| #14 | Orange County, CA | Jul 2026 | 57.7k MCF |
| #15 | Monterey County, CA | Jul 2026 | 49.5k MCF |
| #16 | Fresno County, CA | Jul 2026 | 43k MCF |
| #17 | Tehama County, CA | Jul 2026 | 24.7k MCF |
| #18 | Humboldt County, CA | Jul 2026 | 21.7k MCF |
| #19 | San Luis Obispo County, CA | Jul 2026 | 19k MCF |
| #20 | San Bernardino County, CA | Jul 2026 | 3.5k MCF |
| #21 | Yolo County, CA | Jul 2026 | 2.5k MCF |
| #22 | San Benito County, CA | Jul 2026 | 843 MCF |