| Rank | County | Production Period | Oil Production |
|---|---|---|---|
| #1 | Kern County, CA | Nov 2025 | 5.9M BBLs |
| #2 | Los Angeles County, CA | Nov 2025 | 445.5k BBLs |
| #3 | Fresno County, CA | Nov 2025 | 361.7k BBLs |
| #4 | Ventura County, CA | Nov 2025 | 358.3k BBLs |
| #5 | Monterey County, CA | Nov 2025 | 228.6k BBLs |
| #6 | Orange County, CA | Nov 2025 | 153.5k BBLs |
| #7 | Santa Barbara County, CA | Nov 2025 | 144.8k BBLs |
| #8 | San Luis Obispo County, CA | Nov 2025 | 47.1k BBLs |
| #9 | Kings County, CA | Nov 2025 | 5.0k BBLs |
| #10 | Tulare County, CA | Nov 2025 | 1.4k BBLs |
| #11 | Contra Costa County, CA | Nov 2025 | 1.4k BBLs |
| #12 | Santa Clara County, CA | Nov 2025 | 901 BBLs |
| Rank | County | Production Period | Gas Production |
|---|---|---|---|
| #1 | Kern County, CA | Nov 2025 | 5.8M MCF |
| #2 | Los Angeles County, CA | Nov 2025 | 5.7M MCF |
| #3 | Butte County, CA | Nov 2025 | 2.8M MCF |
| #4 | San Joaquin County, CA | Nov 2025 | 2.5M MCF |
| #5 | Colusa County, CA | Nov 2025 | 1.7M MCF |
| #6 | Santa Barbara County, CA | Nov 2025 | 1.2M MCF |
| #7 | Madera County, CA | Nov 2025 | 618.7k MCF |
| #8 | Ventura County, CA | Nov 2025 | 395.8k MCF |
| #9 | Contra Costa County, CA | Nov 2025 | 375k MCF |
| #10 | Sutter County, CA | Nov 2025 | 147.8k MCF |
| #11 | Glenn County, CA | Nov 2025 | 93k MCF |
| #12 | Sacramento County, CA | Nov 2025 | 84.6k MCF |