Codes Titles Number of US Businesses
21 Mining 28,963
211120Crude Petroleum Extraction5,086
211130Natural Gas Extraction468
212111Bituminous Coal and Lignite Surface Mining 440
212112Bituminous Coal Underground Mining 117
212113Anthracite Mining 47
212210Iron Ore Mining82
212221Gold Ore Mining 344
212222Silver Ore Mining 38
212230Copper, Nickel, Lead, and Zinc Mining 129
212291Uranium-Radium-Vanadium Ore Mining 51
212299All Other Metal Ore Mining 57
212311Dimension Stone Mining and Quarrying 538
212312Crushed and Broken Limestone Mining and Quarrying 736
212313Crushed and Broken Granite Mining and Quarrying 184
212319Other Crushed and Broken Stone Mining and Quarrying 404
212321Construction Sand and Gravel Mining 2,226
212322Industrial Sand Mining 191
212324Kaolin and Ball Clay Mining 54
212325Clay and Ceramic and Refractory Minerals Mining 116
212391Potash, Soda, and Borate Mineral Mining 36
212392Phosphate Rock Mining 22
212393Other Chemical and Fertilizer Mineral Mining 117
212399All Other Nonmetallic Mineral Mining 291
213111Drilling Oil and Gas Wells2,407
213112Support Activities for Oil and Gas Operations 13,739
213113Support Activities for Coal Mining 478
213114Support Activities for Metal Mining 370
213115Support Activities for Nonmetallic Minerals (except Fuels) Mining 195