| Rank | County | Production Period | Oil Production |
|---|---|---|---|
| #5 | Monterey County, CA | Feb 2020 | 630.4k BBLs |
| #6 | Fresno County, CA | Feb 2020 | 497.2k BBLs |
| #7 | Santa Barbara County, CA | Feb 2020 | 192.3k BBLs |
| #8 | Contra Costa County, CA | Feb 2020 | 18.9k BBLs |
| #9 | San Luis Obispo County, CA | Feb 2020 | 37.7k BBLs |
| #10 | Kings County, CA | Feb 2020 | 10.6k BBLs |
| #11 | Sacramento County, CA | Feb 2020 | 664 BBLs |
| #12 | Santa Clara County, CA | Feb 2020 | 1.4k BBLs |
| #13 | San Benito County, CA | Feb 2020 | 906 BBLs |
| #14 | Tulare County, CA | Feb 2020 | 3.0k BBLs |
| #15 | Alameda County, CA | Feb 2020 | 696 BBLs |
| #22 | Solano County, CA | Feb 2020 | 113 BBLs |
| Rank | County | Production Period | Gas Production |
|---|---|---|---|
| #2 | Kern County, CA | Feb 2020 | 10.5M MCF |
| #3 | Colusa County, CA | Feb 2020 | 1.1M MCF |
| #4 | Butte County, CA | Feb 2020 | 1.5M MCF |
| #5 | Los Angeles County, CA | Feb 2020 | 3.7M MCF |
| #6 | Sutter County, CA | Feb 2020 | 270.3k MCF |
| #7 | Contra Costa County, CA | Feb 2020 | 347k MCF |
| #8 | Sacramento County, CA | Feb 2020 | 229.7k MCF |
| #9 | Ventura County, CA | Feb 2020 | 466.5k MCF |
| #10 | Madera County, CA | Feb 2020 | 366.2k MCF |
| #11 | Glenn County, CA | Feb 2020 | 192.8k MCF |
| #12 | Solano County, CA | Feb 2020 | 115.3k MCF |
| #13 | Santa Barbara County, CA | Feb 2020 | 363.8k MCF |