| 2008 Bentonite Production and Employment | ||
| Tons | Employees | |
| Wyoming Bentonite Mining | 6,284,419 (mined) | 841 |
| 3,606,154 (plant) | ||
| Lovell | 724,000 | 113 |
| American Colloid Co. | ||
| Belle/Colony Mine | 1,866,450 | 160 |
| American Colloid Co. | ||
| Upton | shut down | |
| American Colloid Co. | ||
| Colony Mine/Mill | 634,684 | 105 |
| Bentonite Performance Minerals | ||
| Lovell | 816,368 | 9 |
| Bentonite Performance Minerals | ||
| M-I SWACO Mine/Mill | 842,362 | 186 |
| M-I SWACO | ||
| Stucco Mine/Mill | 621,741 | 53 |
| Wyo- Ben | ||
| Sage Creek Mill | 172,655 | 32 |
| Wyo-Ben | ||
| Kaycee Mine | 600,000 | 15 |
| Black Hills Bentonite Corp. | ||
| Oshoto Mine | 58,613 | 7 |
| Black Hills Bentonite Corp. | ||
| TenSleep Mine | 234,528 | 7 |
| Black Hills Bentonite Corp. | ||
| Lovell Mill | 54,000 | 71 |
| CETCO | ||
| BCS & MK Mines | 30,000 | 1 |
| Kenneth E. Tanner | ||