| Rank | County | Production Period | Oil Production |
|---|---|---|---|
| #2 | Los Angeles County, CA | Mar 2025 | 550.6k BBLs |
| #3 | Ventura County, CA | Mar 2025 | 360.8k BBLs |
| #4 | Fresno County, CA | Mar 2025 | 300.1k BBLs |
| #5 | Monterey County, CA | Mar 2025 | 189.4k BBLs |
| #6 | Orange County, CA | Mar 2025 | 152.2k BBLs |
| #7 | Santa Barbara County, CA | Mar 2025 | 133.1k BBLs |
| #8 | San Luis Obispo County, CA | Mar 2025 | 53.9k BBLs |
| #9 | Kings County, CA | Mar 2025 | 6.2k BBLs |
| #10 | Santa Clara County, CA | Mar 2025 | 1.6k BBLs |
| #11 | Tulare County, CA | Mar 2025 | 1.6k BBLs |
| #12 | San Benito County, CA | Mar 2025 | 847 BBLs |
| #13 | Sacramento County, CA | Mar 2025 | 169 BBLs |
| Rank | County | Production Period | Gas Production |
|---|---|---|---|
| #12 | Sacramento County, CA | Mar 2025 | 80.6k MCF |
| #13 | Orange County, CA | Mar 2025 | 75.9k MCF |
| #14 | Contra Costa County, CA | Mar 2025 | 69k MCF |
| #15 | Fresno County, CA | Mar 2025 | 52.1k MCF |
| #16 | Monterey County, CA | Mar 2025 | 42.3k MCF |
| #17 | Tehama County, CA | Mar 2025 | 25.7k MCF |
| #18 | Humboldt County, CA | Mar 2025 | 25k MCF |
| #19 | San Luis Obispo County, CA | Mar 2025 | 24.2k MCF |
| #20 | Kings County, CA | Mar 2025 | 13.7k MCF |
| #21 | Santa Clara County, CA | Mar 2025 | 1.6k MCF |
| #22 | San Benito County, CA | Mar 2025 | 1.1k MCF |
| #23 | Yolo County, CA | Mar 2025 | 138 MCF |