Codes Titles Number of US Businesses
21 Mining 29,041
211120Crude Petroleum Extraction5,138
211130Natural Gas Extraction476
212111Bituminous Coal and Lignite Surface Mining 431
212112Bituminous Coal Underground Mining 118
212113Anthracite Mining 47
212210Iron Ore Mining80
212221Gold Ore Mining 348
212222Silver Ore Mining 38
212230Copper, Nickel, Lead, and Zinc Mining 127
212291Uranium-Radium-Vanadium Ore Mining 52
212299All Other Metal Ore Mining 54
212311Dimension Stone Mining and Quarrying 544
212312Crushed and Broken Limestone Mining and Quarrying 742
212313Crushed and Broken Granite Mining and Quarrying 182
212319Other Crushed and Broken Stone Mining and Quarrying 401
212321Construction Sand and Gravel Mining 2,212
212322Industrial Sand Mining 191
212324Kaolin and Ball Clay Mining 52
212325Clay and Ceramic and Refractory Minerals Mining 121
212391Potash, Soda, and Borate Mineral Mining 37
212392Phosphate Rock Mining 21
212393Other Chemical and Fertilizer Mineral Mining 121
212399All Other Nonmetallic Mineral Mining 289
213111Drilling Oil and Gas Wells2,408
213112Support Activities for Oil and Gas Operations 13,747
213113Support Activities for Coal Mining 492
213114Support Activities for Metal Mining 374
213115Support Activities for Nonmetallic Minerals (except Fuels) Mining 198