| Rank | County | Production Period | Oil Production |
|---|---|---|---|
| #7 | Santa Barbara County, CA | Sep 2019 | 196.1k BBLs |
| #8 | Contra Costa County, CA | Sep 2019 | 19.5k BBLs |
| #9 | San Luis Obispo County, CA | Sep 2019 | 41.3k BBLs |
| #10 | Kings County, CA | Sep 2019 | 8.9k BBLs |
| #11 | Santa Clara County, CA | Sep 2019 | 1.9k BBLs |
| #12 | Sacramento County, CA | Sep 2019 | 664 BBLs |
| #13 | San Benito County, CA | Sep 2019 | 831 BBLs |
| #14 | Tulare County, CA | Sep 2019 | 2.8k BBLs |
| #15 | Solano County, CA | Sep 2019 | 127 BBLs |
| #25 | San Bernardino County, CA | Sep 2019 | 724 BBLs |
| #26 | San Mateo County, CA | Sep 2019 | 4 BBLs |
| #28 | Alameda County, CA | Sep 2019 | 1 BBLs |
| Rank | County | Production Period | Gas Production |
|---|---|---|---|
| #5 | Sutter County, CA | Sep 2019 | 322.2k MCF |
| #6 | Butte County, CA | Sep 2019 | 822.1k MCF |
| #7 | Madera County, CA | Sep 2019 | 989.3k MCF |
| #8 | San Joaquin County, CA | Sep 2019 | 585.6k MCF |
| #9 | Sacramento County, CA | Sep 2019 | 268.2k MCF |
| #10 | Ventura County, CA | Sep 2019 | 513.7k MCF |
| #11 | Glenn County, CA | Sep 2019 | 228.9k MCF |
| #12 | Orange County, CA | Sep 2019 | 97.5k MCF |
| #13 | Santa Barbara County, CA | Sep 2019 | 258.7k MCF |
| #14 | Contra Costa County, CA | Sep 2019 | 19k MCF |
| #15 | Monterey County, CA | Sep 2019 | 80.2k MCF |
| #16 | Kings County, CA | Sep 2019 | 26.7k MCF |