U.S. oil & gas wells
1,232,530 catalogued wellbores, state by state. Six states carry full regulator registries; the rest carry the federal documented-orphaned-wells overlay while their registry pipelines come online.
Dataset updated . Derived from public data sources.
By state
| State | Wells | Active | Plugged | Orphans | Coverage |
|---|---|---|---|---|---|
| Oklahoma | 456,077 | 130,315 | 246,131 | 24,965 | Full state registry |
| California | 242,471 | 54,361 | 145,487 | 3,338 | Full state registry |
| New Mexico | 141,088 | 54,451 | 51,016 | 652 | Full state registry |
| Wyoming | 129,955 | 22,653 | 66,351 | 0 | Full state registry |
| Colorado | 124,327 | 37,061 | 55,121 | 409 | Full state registry |
| North Dakota | 43,680 | 20,632 | 13,021 | 953 | Full state registry |
| Ohio | 20,557 | 0 | 0 | 20,557 | Orphan overlay only |
| Pennsylvania | 19,160 | 0 | 0 | 19,160 | Orphan overlay only |
| Kentucky | 12,695 | 0 | 0 | 12,695 | Orphan overlay only |
| Illinois | 8,478 | 0 | 0 | 8,478 | Orphan overlay only |
| New York | 7,029 | 0 | 0 | 7,029 | Orphan overlay only |
| Texas | 5,854 | 0 | 0 | 5,854 | Orphan overlay only |
| Kansas | 5,477 | 0 | 0 | 5,477 | Orphan overlay only |
| Missouri | 4,892 | 0 | 0 | 4,892 | Orphan overlay only |
| Louisiana | 4,484 | 0 | 0 | 4,484 | Orphan overlay only |
| West Virginia | 3,594 | 0 | 0 | 3,594 | Orphan overlay only |
| Indiana | 575 | 0 | 0 | 575 | Orphan overlay only |
| Tennessee | 481 | 0 | 0 | 481 | Orphan overlay only |
| Nebraska | 479 | 0 | 0 | 479 | Orphan overlay only |
| Michigan | 444 | 0 | 0 | 444 | Orphan overlay only |
| Arkansas | 349 | 0 | 0 | 349 | Orphan overlay only |
| Montana | 221 | 0 | 0 | 221 | Orphan overlay only |
| Utah | 72 | 0 | 0 | 72 | Orphan overlay only |
| Alabama | 49 | 0 | 0 | 49 | Orphan overlay only |
| Mississippi | 30 | 0 | 0 | 30 | Orphan overlay only |
| Alaska | 12 | 0 | 0 | 12 | Orphan overlay only |
Texas (~1.1M wellbores) and Pennsylvania (~252k) registries are in the ingest queue — see methodology.