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1: Executive Summary

2: About Oil/Gas Leases

3: Oil & Gas Impacts

4: Bush Admin Rollbacks

5: The Spin on Drilling

6: Hotspot: Roan Plateau, CO

7: Hotspot: Otero Mesa, NM

8: Hotspot: Rocky Mtn Front, MT

9: Hotspot: Powder River Basin, WY

10: Hotspot: Book Cliffs, UT

11: Oil, Gas, Political Cash

12: EWG Recommendations

13: Methodology

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Atlas of Active Leases

Regional Summaries




Search for a Lease Holder





The Western United States

State Summary | Lands Leased | Maps | Land Protection | Lease Holders

Oil and Gas Lease Holders of The United States land

In The United States, 8,604 companies and individuals hold 44,690 active leases on 34,946,492 acres of land. The table below shows who holds active leases, and provides links to comprehensive information on leases held across the west by individual companies, and political contributions made by companies over the past three election cycles.

Rank Name City/State Number of
Acres Currently
1Yates Petroleum CorpArtesia, NM 88210 4,098  3,584,742 
2Encana Oil & Gas IncCalgary, Alberta, Canada 1,464  1,359,351 
3Tom Brown IncDenver, CO 80202 1,365  1,150,518 
4Devon Energy CorporationOklahoma City, OK 73102 1,528  1,054,235 
5Westport Oil & Gas Co LPDenver, CO 80202 1,199  1,022,347 
6Burlington ResourcesFort Worth, TX 76102 1,223  914,375 
7ConocoPhillipsHouston, TX 77252 976  811,131 
8Questar CorporationSalt Lake City, UT 84145 1,102  768,804 
9Exxon MobilIrving, TX 75039 1,175  734,004 
10Anadarko Petroleum CorpThe Woodlands, TX 77380 931  732,058 
See all lease holders in The United States

Source: EWG analysis of leasing and drilling records in 12 western states, contained in the Bureau of Land Management's Land and Mineral Records 2000 database, acquired by EWG May 15 2004.