2022 NAICS national industry in sector 21 Mining, Quarrying, and Oil and Gas Extraction
212115 Underground Coal Mining
NAICS 212115 is the US industry code for underground coal mining. This U.S.
- Code
- 212115 (2022 NAICS)
- Title
- Underground Coal Mining
- Part of
- Coal Mining
- SBA small business limit
- Up to 1,500 employees
- Closest UK SIC
- 05101, 05102, 05200 (details)
Changes coming. The NAICS 2027 revision applies to data from 1 January 2027, and SBA proposed new size standards on 20 August 2026. The values on this page are the ones in force today; we update this page when the official files change.
Official definition
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.
When to use a different code
Census classifies these close-sounding activities somewhere else. Businesses mainly engaged in:
- Surface mining and/or beneficiating of bituminous coal, lignite, and anthracite coal are classified in U.S. Industry 212114, Surface Coal Mining.
- Providing support activities (except geophysical surveying and mapping, site preparation, construction, and transportation) for the mining of coal on a contract or fee basis are classified in U.S. Industry 213113, Support Activities for Coal Mining.
- Manufacturing coke oven products in coke oven establishments are classified in U.S. Industry 324199, All Other Petroleum and Coal Products Manufacturing.
- Manufacturing coal products in steel mills are classified in Industry 331110, Iron and Steel Mills and Ferroalloy Manufacturing.
Activities listed under 212115
The Census index assigns these 7 activities to this code. If your business matches one, this is your code.
- Bituminous coal or anthracite underground mine site development for own account
- Bituminous coal or anthracite underground mining
- Coal, bituminous or anthracite, underground mining
- Hard coal (i.e., anthracite) underground mining
- Semianthracite underground mining
- Semibituminous coal underground mining
- Subbituminous coal underground mining
SBA size standard for 212115
To count as a small business for SBA loans and federal contracts under NAICS 212115, your business (including affiliates) must not exceed 1,500 employees. Check your business.
Source: SBA table of size standards, effective March 17, 2023.
Closest UK SIC 2007 codes
There is no official one-to-one link between NAICS and UK SIC. These codes share the same international class (ISIC Rev. 4: 0520, 0510), so treat them as a starting point and check the definition.
Built from Census concordances 2022→2017 NAICS and 2017 NAICS→ISIC Rev. 4.
Similar codes to compare
Data last changed November 14, 2026. How this page is built.