Oil & gas wells in Boulder County, CO
783 catalogued wells in Boulder County, Colorado, from the state regulator registry and the federal orphaned-well inventory.
Dataset updated . Derived from public data sources.
At a glance
Boulder County, Colorado has 783 catalogued oil & gas wells: 106 active (14%), 400 plugged & abandoned (51%) and 4 documented orphans. It ranks 22nd of the 47 Colorado counties WellCensus profiles by well count and holds 0.6% of the state's 124,327 catalogued wells.
Catalogued wells
783
Active
106
Plugged
400
Documented orphans
4
What is the status of oil and gas wells in Boulder County?
14% of Boulder County's wells are active, 16 percentage points below the Colorado share of 29%. 51% are plugged & abandoned, against 44% statewide and 47% nationally. 66 wells (8%) are shut-in — unplugged but idle. 4 wells (0.5%) are documented orphans with no operator able to plug them, compared with 1% across Colorado and 4% nationally. The remaining 207 carry status codes outside those classes, such as permitted or cancelled locations.
What kinds of wells are in Boulder County?
By product class, 114 of the county's wells (15%) are oil wells, 273 (35%) gas wells and 0 (0%) injection wells. Statewide the oil share is 24% and the gas share 34%. The deepest total depth published for a Boulder County well is 10,043 ft, against 29,046 ft for Colorado as a whole. 100% of the county's wells carry coordinates and appear on the map.
How does Boulder County compare with other Colorado counties?
Boulder County has the 22nd-most catalogued wells of the 47 Colorado counties with at least 25. The median Colorado county on WellCensus has 497 wells. The largest, Weld County, has 45,804. By documented orphans it ranks 26th in Colorado.
Who operates wells in Boulder County?
96 distinct operators of record are linked to wells in Boulder 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 Boulder County
🔒 Create a free account to export CSV| Well | API # / state ID | Status | Type | Operator |
|---|---|---|---|---|
| 1 Borra | 05-013-05002 | Plugged & abandoned | Other type | First Federal Bank Of Colorado |
| 1 Martin | 05-013-05003 | Plugged & abandoned | Other type | Unknown |
| 1 Casacoles | 05-013-05004 | Plugged & abandoned | Other type | Old Operators - Status Unknown |
| 1 Odlum | 05-013-05007 | Plugged & abandoned | Other type | Old Operators - Status Unknown |
| 1 Eberharter | 05-013-05008 | Plugged & abandoned | Other type | Boulder Oil Company |
| 1 Foste | 05-013-05010 | Plugged & abandoned | Other type | Old Operators - Status Unknown |
| 1 (Owp) Prince | 05-013-05011 | Plugged & abandoned | Other type | Energy & Carbon Management Commission |
| 1 Steinbaugh | 05-013-05012 | Plugged & abandoned | Other type | Omega Oil Corp. |
| 2 Fee | 05-013-05013 | Plugged & abandoned | Other type | Baker Oil |
| 5 (Owp) Maxwell | 05-013-05014 | Plugged & abandoned | Other type | Warren* Ja |
| 1 Timken | 05-013-05015 | Plugged & abandoned | Other type | Juhl* Marius & Associates |
| 1 Hendricks | 05-013-05017 | Plugged & abandoned | Other type | Suhr-Fiedler-Lock Drlg Co |
| 1 (Owp) Juhl | 05-013-05018 | Plugged & abandoned | Other type | Rocky Mountain Standard, Inc |
| 1 Ellison | 05-013-05019 | Plugged & abandoned | Other type | Eureka Oil Company |
| 1 Gallagher | 05-013-05021 | Plugged & abandoned | Other type | Gallagher Family Partnership |
| 1-A Gallagher | 05-013-05022 | Plugged & abandoned | Other type | Oriental Oil Refg Co |
| 1 Gallagher | 05-013-05023 | Plugged & abandoned | Oil | Gallagher Family Partnership |
| 1 Gorce | 05-013-05024 | Plugged & abandoned | Other type | H & H Oil Co |
| 1 Digge | 05-013-05026 | Plugged & abandoned | Other type | Williamson Inc* Lowell |
| Well API 05-013-05027 | 05-013-05027 | Plugged & abandoned | Other type | Old Operators - Status Unknown |
| Well API 05-013-05028 | 05-013-05028 | Plugged & abandoned | Other type | Old Operators - Status Unknown |
| 1 Big Liz | 05-013-05029 | Plugged & abandoned | Other type | Wray* Ed |
| 1 Moshe | 05-013-05030 | Plugged & abandoned | Other type | P..M. Enterprises |
| Well API 05-013-05031 | 05-013-05031 | Plugged & abandoned | Other type | Old Operators - Status Unknown |
| 1 Lore | 05-013-05032 | Plugged & abandoned | Other type | P.M. Petroleum Corp. |
A sample of the county’s wells — every catalogued well has its own page. Browse all 783 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 Boulder County, CO?
Boulder County, Colorado has 783 catalogued oil & gas wells: 106 active, 400 plugged and 4 documented orphans.
How many orphaned wells are in Boulder County?
4 wells in Boulder County, Colorado are documented orphans — unplugged with no solvent operator of record, the 26th-highest count among Colorado counties.
What share of wells in Boulder County are plugged?
400 of Boulder County's 783 catalogued wells (51%) are plugged & abandoned, compared with 44% across Colorado.
Which Colorado county has the most oil and gas wells?
Weld County has the most catalogued wells of any Colorado county on WellCensus (45,804); Boulder County ranks 22nd with 783.
How many companies operate wells in Boulder County?
96 distinct operators of record are linked to catalogued wells in Boulder County, Colorado.
Nearby in the Colorado rankings
About this data
Source: Colorado ECMC 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 Boulder County, Colorado”, https://wellcensus.com/wells/colorado/boulder (data as of October 10, 2026).