Codes Titles Number of US Businesses
21 Mining 28,732
211120Crude Petroleum Extraction5,093
211130Natural Gas Extraction451
212111Bituminous Coal and Lignite Surface Mining 416
212112Bituminous Coal Underground Mining 116
212113Anthracite Mining 42
212210Iron Ore Mining79
212221Gold Ore Mining 326
212222Silver Ore Mining 40
212230Copper, Nickel, Lead, and Zinc Mining 125
212291Uranium-Radium-Vanadium Ore Mining 52
212299All Other Metal Ore Mining 57
212311Dimension Stone Mining and Quarrying 510
212312Crushed and Broken Limestone Mining and Quarrying 740
212313Crushed and Broken Granite Mining and Quarrying 202
212319Other Crushed and Broken Stone Mining and Quarrying 398
212321Construction Sand and Gravel Mining 2,220
212322Industrial Sand Mining 203
212324Kaolin and Ball Clay Mining 55
212325Clay and Ceramic and Refractory Minerals Mining 115
212391Potash, Soda, and Borate Mineral Mining 37
212392Phosphate Rock Mining 20
212393Other Chemical and Fertilizer Mineral Mining 111
212399All Other Nonmetallic Mineral Mining 295
213111Drilling Oil and Gas Wells2,359
213112Support Activities for Oil and Gas Operations 13,640
213113Support Activities for Coal Mining 459
213114Support Activities for Metal Mining 377
213115Support Activities for Nonmetallic Minerals (except Fuels) Mining 194