NAICS Code 212115 — Underground Coal Mining

National Industry in the official 2022 North American Industry Classification System (U.S. Census Bureau). It is one of 2 national industries under 21211 (Coal Mining).

Code	212115
Title	Underground Coal Mining
Level	National Industry (6-digit)
Edition	NAICS 2022 edition
SBA size standard	1,500 employees

Official definition (2022 NAICS)

This U.S. industry comprises establishments primarily engaged in one or more of the following: (1) underground mining of bituminous and anthracite coal; (2) developing bituminous and anthracite coal underground mine sites; and (3) underground mining and beneficiating (e.g., cleaning, washing, screening, and sizing) of bituminous and anthracite coal.

Is a business under 212115 "small"?

Under the SBA size standards (13 CFR 121.201, effective March 17, 2023), a business classified in NAICS 212115 qualifies as a small business if it does not exceed 1,500 employees. Small-business status determines eligibility for federal set-aside contracts, SAM.gov certifications and SBA loan programs — employee count is averaged over the latest 24 months.

Where 212115 sits in the hierarchy

Level	Code	Title
Sector	21	Mining, Quarrying, and Oil and Gas Extraction
Subsector	212	Mining (except Oil and Gas)
Industry Group	2121	Coal Mining
NAICS Industry	21211	Coal Mining
National Industry	212115	Underground Coal Mining

No direct SIC mapping is shown for this code: it was introduced or redefined after the official 1987 SIC ↔ 2002 NAICS concordance. Use the crosswalk tool to explore related legacy codes.

Related National Industry codes

• 212114 — Surface Coal Mining

Data: official 2022 NAICS structure, descriptions and Census concordances, U.S. Census Bureau — U.S. government works in the public domain (17 U.S.C. §105). Suggested reference, not an official determination.