Structure of NAICS Code 21 - Mining, Quarrying, and Oil and Gas Extraction

Hierarchy

NAICS 21 Details Page List All NAICS Top Categories

Each industry is classified hierarchically, starting from broad (3-digit) to specific (4-, 5-, 6-digit) codes, including extended 8-digit codes for detailed classification. Click on each category link to navigate to detailed pages with comprehensive industry information.

Hierarchy

3-Digits

4-Digits

5-Digits

6-Digits

211120 - Crude Petroleum Extraction NAICS 8-Digits (8 Codes)

211120-01 - Gas Boosters 211120-02 - Oil & Gas Producers 211120-03 - Oil & Gas-Production 211120-04 - Oil Companies 211120-05 - Oil Operators 211120-06 - Oil Crude 211120-07 - Petroleum Contractors 211120-08 - Petrochemical Contractors

21112 - Crude Petroleum Extraction

211130 - Natural Gas Extraction NAICS 8-Digits (1 Codes)

211130-01 - Natural Gas Liquids

21113 - Natural Gas Extraction

2111 - Oil and Gas Extraction

211 - Oil and Gas Extraction

212114 - Surface Coal Mining NAICS 8-Digits (2 Codes)

212114-01 - Coal Mining & Shipping 212114-02 - Coal Washing

212115 - Underground Coal Mining NAICS 8-Digits (1 Codes)

212115-01 - Bituminous Coal-Underground Mining

21211 - Coal Mining

2121 - Coal Mining

212210 - Iron Ore Mining NAICS 8-Digits (1 Codes)

212210-01 - Iron-Ore

21221 - Iron Ore Mining

212220 - Gold Ore and Silver Ore Mining NAICS 8-Digits (3 Codes)

212220-01 - Gold Ores 212220-02 - Gold Panning 212220-04 - Silver Ores

21222 - Gold Ore and Silver Ore Mining

212230 - Copper, Nickel, Lead, and Zinc Mining NAICS 8-Digits (1 Codes)

212230-02 - Copper Ores

21223 - Copper, Nickel, Lead, and Zinc Mining

212290 - Other Metal Ore Mining NAICS 8-Digits (3 Codes)

212290-01 - Uranium 212290-02 - Ferroalloy Ores Except Vanadium 212290-03 - Miscellaneous Metal Ores NEC

21229 - Other Metal Ore Mining

2122 - Metal Ore Mining

212311 - Dimension Stone Mining and Quarrying NAICS 8-Digits (2 Codes)

212311-01 - Dimension Stone 212311-02 - Stone-Natural

212312 - Crushed and Broken Limestone Mining and Quarrying NAICS 8-Digits (4 Codes)

212312-01 - Crushed & Broken Limestone 212312-02 - Dolomite 212312-03 - Limestone 212312-04 - Limestone-Agricultural (Wholesale)

212313 - Crushed and Broken Granite Mining and Quarrying NAICS 8-Digits (3 Codes)

212313-01 - Crushed & Broken Granite 212313-02 - Granite-Decomposed 212313-03 - Granite Cultured

212319 - Other Crushed and Broken Stone Mining and Quarrying NAICS 8-Digits (2 Codes)

212319-02 - Crushed & Broken Stone NEC 212319-07 - Stone-Crushed

21231 - Stone Mining and Quarrying

212321 - Construction Sand and Gravel Mining NAICS 8-Digits (3 Codes)

212321-01 - Construction-Sand & Gravel 212321-02 - Quarries 212321-05 - Sand & Gravel (Manufacturing)

212322 - Industrial Sand Mining NAICS 8-Digits (2 Codes)

212322-01 - Industrial Sand 212322-02 - Silica

212323 - Kaolin, Clay, and Ceramic and Refractory Minerals Mining NAICS 8-Digits (4 Codes)

212323-01 - Kaolin & Ball Clay 212323-02 - Bentonite 212323-03 - Clay 212323-04 - Clay Ceramic & Refractory Minerals NEC

21232 - Sand, Gravel, Clay, and Ceramic and Refractory Minerals Mining and Quarrying

212390 - Other Nonmetallic Mineral Mining and Quarrying NAICS 8-Digits (13 Codes)

212390-01 - Potash Soda & Borate Minerals 212390-03 - Chemical & Fertilizer Mining NEC 212390-05 - Salt Miners 212390-06 - Salt Processing 212390-07 - Sulphur 212390-08 - Diamond Drilling 212390-09 - Mineral Exploration 212390-10 - Mining Companies 212390-11 - Mining Contractors 212390-12 - Miscellaneous Nonmetallic Minerals 212390-13 - Gems & Minerals 212390-14 - Mines 212390-15 - Abrasive Materials

21239 - Other Nonmetallic Mineral Mining and Quarrying

2123 - Nonmetallic Mineral Mining and Quarrying

212 - Mining (except Oil and Gas)

213111 - Drilling Oil and Gas Wells NAICS 8-Digits (8 Codes)

213111-01 - Contractors-Oil Field 213111-02 - Drilling-Diamond Core 213111-03 - Drilling-Oil & Gas Wells 213111-04 - Gas Well Drilling 213111-05 - Oil Well Directional Drilling 213111-06 - Oil Well Drilling 213111-08 - Drilling Companies 213111-09 - Oil & Gas Services

213112 - Support Activities for Oil and Gas Operations NAICS 8-Digits (17 Codes)

213112-01 - Lubrication Consultants 213112-02 - Oil & Gas Consultant 213112-03 - Oil & Gas Exploration & Development 213112-04 - Oil & Gas-Field Services NEC 213112-05 - Oil Field Equipment Repairing 213112-06 - Oil Field Maintenance 213112-07 - Oil Inspectors 213112-08 - Oil Reports 213112-09 - Oil Well Services 213112-10 - Offshore Platforms/Oil 213112-11 - Oil Field Compressor Service 213112-12 - Oil Field Solids Control 213112-13 - Well Maintenance Service 213112-15 - Oil Field Welding 213112-16 - Oil & Gas Field Training 213112-17 - Pipe Testing 213112-18 - Oil & Gas Fleet Washing

213113 - Support Activities for Coal Mining NAICS 8-Digits (1 Codes)

213113-01 - Coal Mining Services

213114 - Support Activities for Metal Mining NAICS 8-Digits (1 Codes)

213114-01 - Metal Mining Services

213115 - Support Activities for Nonmetallic Minerals (except Fuels) Mining NAICS 8-Digits (1 Codes)

213115-01 - Nonmetallic Minerals Service-Except Fuels

21311 - Support Activities for Mining

2131 - Support Activities for Mining

213 - Support Activities for Mining