At the bottom of this page, you will see two headings: 

1. "Mineral Lease Information Maps" contain information that includes Department ownership, most recent parcel classification, and lease information including lease numbers. This information can also be obtained by clicking on the map below (average downloaded file size 1.2 MB).  
   
   
2. "Mineral Lease Information Map Legend Reports" list all of the oil and gas lease numbers and the corresponding lessee in each County.