Oil & gas wells in Yolo County, CA
1,486 catalogued wells in Yolo County, California, from the state regulator registry and the federal orphaned-well inventory.
Dataset updated . Derived from public data sources.
At a glance
Yolo County, California has 1,486 catalogued oil & gas wells: 14 active (0.9%), 1,396 plugged & abandoned (94%) and 1 documented orphans. It ranks 11th of the 39 California counties WellCensus profiles by well count and holds 0.6% of the state's 242,471 catalogued wells.
Catalogued wells
1,486
Active
14
Plugged
1,396
Documented orphans
1
What is the status of oil and gas wells in Yolo County?
0.9% of Yolo County's wells are active, 21 percentage points below the California share of 22%. 94% are plugged & abandoned, against 60% statewide and 47% nationally. 26 wells (2%) are shut-in — unplugged but idle. 1 wells (0.1%) are documented orphans with no operator able to plug them, compared with 1% across California and 4% nationally. The remaining 49 carry status codes outside those classes, such as permitted or cancelled locations.
What kinds of wells are in Yolo County?
By product class, 4 of the county's wells (0.3%) are oil wells, 635 (43%) gas wells and 1 (0.1%) injection wells. Statewide the oil share is 68% and the gas share 3%. 100% of the county's wells carry coordinates and appear on the map.
How does Yolo County compare with other California counties?
Yolo County has the 11th-most catalogued wells of the 39 California counties with at least 25. The median California county on WellCensus has 675 wells. The largest, Kern County, has 156,849. By documented orphans it ranks 29th in California.
Who operates wells in Yolo County?
231 distinct operators of record are linked to wells in Yolo County. 100% of the county's wells carry a link to a canonical operator profile; the rest list no operator or a name not yet resolved. Each well's page names its operator where the state publishes one.
Wells in Yolo County
🔒 Create a free account to export CSV| Well | API # / state ID | Status | Type | Operator |
|---|---|---|---|---|
| Irrigated Valley Land 1 | 04-113-00001 | Plugged & abandoned | Other type | Atlantic Oil Company |
| Pylman Unit 1 | 04-113-00002 | Plugged & abandoned | Other type | Union Oil Company of California |
| Shell Unit 2 1 | 04-113-00003 | Plugged & abandoned | Gas | Atlantic Oil Company |
| Shell-Oliver 1 | 04-113-00004 | Plugged & abandoned | Gas | Atlantic Oil Company |
| Rheem-Leverich 1 | 04-113-00005 | Plugged & abandoned | Other type | Chevron U.S.A. Inc. |
| King Unit 1 | 04-113-00006 | Plugged & abandoned | Gas | Occidental Petroleum Corporation |
| Parsons Unit 1 | 04-113-00007 | Plugged & abandoned | Other type | Occidental Petroleum Corporation |
| Pilz Unit 2 | 04-113-00008 | Plugged & abandoned | Gas | Occidental Petroleum Corporation |
| Pollock Unit 1 | 04-113-00009 | Plugged & abandoned | Gas | Occidental Petroleum Corporation |
| Sherman Unit 2 | 04-113-00010 | Plugged & abandoned | Gas | Occidental Petroleum Corporation |
| Sherman Unit 4 | 04-113-00011 | Plugged & abandoned | Gas | Occidental Petroleum Corporation |
| Sherman Unit 3 | 04-113-00012 | Plugged & abandoned | Other type | Occidental Petroleum Corporation |
| Sherman Unit 5 | 04-113-00013 | Plugged & abandoned | Gas | Occidental Petroleum Corporation |
| Pilz Unit 1 | 04-113-00014 | Plugged & abandoned | Gas | Occidental Petroleum Corporation |
| Winchester Eight 1 | 04-113-00015 | Plugged & abandoned | Other type | Chevron U.S.A. Inc. |
| Sherman 1 | 04-113-00016 | Plugged & abandoned | Other type | Union Oil Company of California |
| Union-Dow Standard Community 1 1 | 04-113-00017 | Plugged & abandoned | Other type | Union Oil Company of California |
| Rusa-Richey 2 | 04-113-00018 | Plugged & abandoned | Other type | Alco Oil and Gas Corporation |
| ROCO-Schaupp 75-33 | 04-113-00019 | Plugged & abandoned | Other type | Artnell Oil & Gas Co., Inc. |
| NGC Dubois 1 | 04-113-00020 | Plugged & abandoned | Gas | Marshall Brown, Oper. |
| Hermle 1 | 04-113-00021 | Plugged & abandoned | Other type | Marshall Brown, Oper. |
| Mast 1 | 04-113-00022 | Plugged & abandoned | Other type | C.K.M. Oil Co. |
| Rusa-Lederer Unit 1 | 04-113-00023 | Plugged & abandoned | Gas | Gas Properties, Inc. |
| Universal Richey, et al 1 | 04-113-00024 | Plugged & abandoned | Gas | Gas Properties, Inc. |
| Mohawk-Cobb 1 | 04-113-00025 | Plugged & abandoned | Other type | W. W. Holmes, Operator |
A sample of the county’s wells — every catalogued well has its own page. Browse all 1,486 in search → (filter by operator, status and type, then export), or find a specific well on the live map.
Frequently asked questions
How many oil and gas wells are in Yolo County, CA?
Yolo County, California has 1,486 catalogued oil & gas wells: 14 active, 1,396 plugged and 1 documented orphans.
How many orphaned wells are in Yolo County?
1 wells in Yolo County, California are documented orphans — unplugged with no solvent operator of record, the 29th-highest count among California counties.
What share of wells in Yolo County are plugged?
1,396 of Yolo County's 1,486 catalogued wells (94%) are plugged & abandoned, compared with 60% across California.
Which California county has the most oil and gas wells?
Kern County has the most catalogued wells of any California county on WellCensus (156,849); Yolo County ranks 11th with 1,486.
How many companies operate wells in Yolo County?
231 distinct operators of record are linked to catalogued wells in Yolo County, California.
Nearby in the California rankings
About this data
Source: CalGEM WellSTAR well registry, plus the USGS United States Documented Orphaned Well Database (2026, doi 10.5066/P13FHBYG), as published October 10, 2026 — WellCensus refreshes it monthly. See the methodology for how records are matched, cleaned and scored.
Cite as: WellCensus, “Oil & gas wells in Yolo County, California”, https://wellcensus.com/wells/california/yolo (data as of October 10, 2026).