| Rank | County | Production Period | Oil Production |
|---|---|---|---|
| #6 | Orange County, CA | Apr 2025 | 155k BBLs |
| #7 | Santa Barbara County, CA | Apr 2025 | 145.2k BBLs |
| #8 | San Luis Obispo County, CA | Apr 2025 | 53.1k BBLs |
| #9 | Kings County, CA | Apr 2025 | 7.2k BBLs |
| #10 | Tulare County, CA | Apr 2025 | 2.7k BBLs |
| #11 | Santa Clara County, CA | Apr 2025 | 1.0k BBLs |
| #12 | San Benito County, CA | Apr 2025 | 847 BBLs |
| #13 | Contra Costa County, CA | Apr 2025 | 378 BBLs |
| #14 | Sacramento County, CA | Apr 2025 | 299 BBLs |
| #15 | San Bernardino County, CA | Apr 2025 | 288 BBLs |
| #16 | San Mateo County, CA | Apr 2025 | 7 BBLs |
| #17 | Solano County, CA | Apr 2025 | 4 BBLs |
| Rank | County | Production Period | Gas Production |
|---|---|---|---|
| #2 | San Joaquin County, CA | Apr 2025 | 856.9k MCF |
| #3 | Los Angeles County, CA | Apr 2025 | 795.7k MCF |
| #4 | Ventura County, CA | Apr 2025 | 399.5k MCF |
| #5 | Colusa County, CA | Apr 2025 | 239.3k MCF |
| #6 | Santa Barbara County, CA | Apr 2025 | 183.3k MCF |
| #7 | Sutter County, CA | Apr 2025 | 153.1k MCF |
| #8 | Glenn County, CA | Apr 2025 | 119.4k MCF |
| #9 | Sacramento County, CA | Apr 2025 | 84.3k MCF |
| #10 | Orange County, CA | Apr 2025 | 76.1k MCF |
| #11 | Madera County, CA | Apr 2025 | 75.2k MCF |
| #12 | Fresno County, CA | Apr 2025 | 54.8k MCF |
| #13 | Solano County, CA | Apr 2025 | 53k MCF |