Codes Titles Number of US Businesses
21 Mining 28,544
211120Crude Petroleum Extraction5,023
211130Natural Gas Extraction451
212111Bituminous Coal and Lignite Surface Mining 418
212112Bituminous Coal Underground Mining 116
212113Anthracite Mining 45
212210Iron Ore Mining80
212221Gold Ore Mining 318
212222Silver Ore Mining 37
212230Copper, Nickel, Lead, and Zinc Mining 126
212291Uranium-Radium-Vanadium Ore Mining 50
212299All Other Metal Ore Mining 53
212311Dimension Stone Mining and Quarrying 517
212312Crushed and Broken Limestone Mining and Quarrying 734
212313Crushed and Broken Granite Mining and Quarrying 183
212319Other Crushed and Broken Stone Mining and Quarrying 389
212321Construction Sand and Gravel Mining 2,197
212322Industrial Sand Mining 196
212324Kaolin and Ball Clay Mining 53
212325Clay and Ceramic and Refractory Minerals Mining 111
212391Potash, Soda, and Borate Mineral Mining 34
212392Phosphate Rock Mining 20
212393Other Chemical and Fertilizer Mineral Mining 110
212399All Other Nonmetallic Mineral Mining 289
213111Drilling Oil and Gas Wells2,352
213112Support Activities for Oil and Gas Operations 13,626
213113Support Activities for Coal Mining 459
213114Support Activities for Metal Mining 360
213115Support Activities for Nonmetallic Minerals (except Fuels) Mining 197