| Rank | County | Production Period | Oil Production |
|---|---|---|---|
| #1 | Kern County, CA | Jul 2026 | 4.9M BBLs |
| #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 |
| Rank | County | Production Period | Gas Production |
|---|---|---|---|
| #2 | San Joaquin County, CA | Jul 2026 | 4.1M MCF |
| #3 | Contra Costa County, CA | Jul 2026 | 2.1M MCF |
| #4 | Colusa County, CA | Jul 2026 | 1.8M MCF |
| #5 | Butte County, CA | Jul 2026 | 1.6M MCF |
| #6 | Madera County, CA | Jul 2026 | 1.3M MCF |
| #7 | Ventura County, CA | Jul 2026 | 397.1k MCF |
| #8 | Los Angeles County, CA | Jul 2026 | 260.5k MCF |
| #9 | Solano County, CA | Jul 2026 | 177.8k MCF |
| #10 | Sutter County, CA | Jul 2026 | 128.6k MCF |
| #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 |