NAICS Sector 21

Mining, Quarrying, and Oil and Gas Extraction NAICS Codes

21 NAICS codes in this sector (211120 to 213115)

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All Mining, Quarrying, and Oil and Gas Extraction NAICS Codes

NAICS Code Title SBA Size Standard
211120 Crude Petroleum Extraction 1,250 employees
211130 Natural Gas Extraction 1,250 employees
212114 Surface Coal Mining 1,250 employees
212115 Underground Coal Mining 1,500 employees
212210 Iron Ore Mining 1,400 employees
212220 Gold Ore and Silver Ore Mining 1,500 employees
212230 Copper, Nickel, Lead, and Zinc Mining 1,400 employees
212290 Other Metal Ore Mining 1,250 employees
212311 Dimension Stone Mining and Quarrying 500 employees
212312 Crushed and Broken Limestone Mining and Quarrying 750 employees
212313 Crushed and Broken Granite Mining and Quarrying 850 employees
212319 Other Crushed and Broken Stone Mining and Quarrying 550 employees
212321 Construction Sand and Gravel Mining 500 employees
212322 Industrial Sand Mining 750 employees
212323 Kaolin, Clay, and Ceramic and Refractory Minerals Mining 650 employees
212390 Other Nonmetallic Mineral Mining and Quarrying 600 employees
213111 Drilling Oil and Gas Wells 1,000 employees
213112 Support Activities for Oil and Gas Operations $47M avg. receipts
213113 Support Activities for Coal Mining $27.5M avg. receipts
213114 Support Activities for Metal Mining $41M avg. receipts
213115 Support Activities for Nonmetallic Minerals (except Fuels) Mining $20.5M avg. receipts

About Mining, Quarrying, and Oil and Gas Extraction Federal Contracting

The Mining, Quarrying, and Oil and Gas Extraction sector (NAICS Sector 21) encompasses 21 individual NAICS codes covering a wide range of business activities. Federal agencies contract extensively within this sector, creating opportunities for small businesses that hold the correct NAICS codes and meet the associated SBA small business size standards.

When registering in SAM.gov, selecting the appropriate NAICS codes from the Mining, Quarrying, and Oil and Gas Extraction sector is essential for appearing in contracting officer searches and qualifying for set-aside programs. Each code within this sector has its own SBA size standard — either revenue-based or employee-based — that determines whether your business qualifies as "small" for contracts solicited under that specific code.

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