NAICS 4 Digit Industry Group 2121

Industry Group 2121

NAICS 4 digit Industry Group 2121 – Coal Mining

Definition of NAICS 4 digit industry group 2121: Coal Mining.

Four Digit Industry Group Breakdown for North American Industry Classification System

NAICS codes are broken down by digit. The broadest description starts with the 2 digit sector codes. The 3 digit subsector codes are more specific, then the 4 digit industry group (Where you are now), 5 digit industry, and the most specific is the 6 digit NAICS code. If industry group 2121 does not describe the industry of the business in question, then select the largest applicable code below. From there, follow through the progression of smaller digits to the larger digits in order to obtain the most specific 6 digit classification.


  • Sector 21: Mining, Quarrying, and Oil and Gas Extraction
    • Subsector 212: Mining (except Oil and Gas)
      • Industry Group 2121: Coal Mining
        • Industry 21211: Coal Mining
          • 6 Digit Code(s) NAICS 212111: Bituminous Coal and Lignite Surface Mining
          • 6 Digit Code(s) NAICS 212112: Bituminous Coal Underground Mining
          • 6 Digit Code(s) NAICS 212113: Anthracite Mining

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NAICS 4 Digit Industry Group 2121