| Rank | County | Production Period | Oil Production |
|---|---|---|---|
| #1 | Kern County, CA | Aug 2025 | 4.2M BBLs |
| #2 | Ventura County, CA | Aug 2025 | 364.8k BBLs |
| #3 | Los Angeles County, CA | Aug 2025 | 346.3k BBLs |
| #4 | Fresno County, CA | Aug 2025 | 284.1k BBLs |
| #5 | Monterey County, CA | Aug 2025 | 178.3k BBLs |
| #6 | Santa Barbara County, CA | Aug 2025 | 152.7k BBLs |
| #7 | Orange County, CA | Aug 2025 | 80.1k BBLs |
| #8 | San Luis Obispo County, CA | Aug 2025 | 3.9k BBLs |
| #9 | Kings County, CA | Aug 2025 | 2.9k BBLs |
| #10 | Tulare County, CA | Aug 2025 | 2.0k BBLs |
| #11 | Santa Clara County, CA | Aug 2025 | 1.4k BBLs |
| #12 | San Benito County, CA | Aug 2025 | 692 BBLs |
| Rank | County | Production Period | Gas Production |
|---|---|---|---|
| #1 | Los Angeles County, CA | Aug 2025 | 6.3M MCF |
| #2 | Butte County, CA | Aug 2025 | 3.5M MCF |
| #3 | Colusa County, CA | Aug 2025 | 2.1M MCF |
| #4 | Kern County, CA | Aug 2025 | 1.1M MCF |
| #5 | San Joaquin County, CA | Aug 2025 | 401.2k MCF |
| #6 | Ventura County, CA | Aug 2025 | 380.3k MCF |
| #7 | Santa Barbara County, CA | Aug 2025 | 126.2k MCF |
| #8 | Orange County, CA | Aug 2025 | 49.5k MCF |
| #9 | Fresno County, CA | Aug 2025 | 42.8k MCF |
| #10 | Monterey County, CA | Aug 2025 | 41k MCF |
| #11 | Sutter County, CA | Aug 2025 | 14.5k MCF |
| #12 | Tehama County, CA | Aug 2025 | 13.5k MCF |