Codes Titles Number of US Businesses
21 Mining 28,981
211120Crude Petroleum Extraction5,112
211130Natural Gas Extraction456
212111Bituminous Coal and Lignite Surface Mining 425
212112Bituminous Coal Underground Mining 123
212113Anthracite Mining 44
212210Iron Ore Mining80
212221Gold Ore Mining 319
212222Silver Ore Mining 34
212230Copper, Nickel, Lead, and Zinc Mining 127
212291Uranium-Radium-Vanadium Ore Mining 50
212299All Other Metal Ore Mining 59
212311Dimension Stone Mining and Quarrying 516
212312Crushed and Broken Limestone Mining and Quarrying 742
212313Crushed and Broken Granite Mining and Quarrying 193
212319Other Crushed and Broken Stone Mining and Quarrying 400
212321Construction Sand and Gravel Mining 2,244
212322Industrial Sand Mining 201
212324Kaolin and Ball Clay Mining 55
212325Clay and Ceramic and Refractory Minerals Mining 112
212391Potash, Soda, and Borate Mineral Mining 35
212392Phosphate Rock Mining 20
212393Other Chemical and Fertilizer Mineral Mining 113
212399All Other Nonmetallic Mineral Mining 289
213111Drilling Oil and Gas Wells2,400
213112Support Activities for Oil and Gas Operations 13,804
213113Support Activities for Coal Mining 459
213114Support Activities for Metal Mining 376
213115Support Activities for Nonmetallic Minerals (except Fuels) Mining 193