2022 NAICS national industry in sector 31-33 Manufacturing
327310 Cement Manufacturing
NAICS 327310 is the US industry code for cement manufacturing. It covers establishments primarily engaged in manufacturing Portland, natural, masonry, pozzolanic, and other hydraulic cements.
- Code
- 327310 (2022 NAICS)
- Title
- Cement Manufacturing
- Part of
- Cement and Concrete Product Manufacturing
- SBA small business limit
- Up to 1,000 employees
- Closest UK SIC
- 23910, 23990 (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 industry comprises establishments primarily engaged in manufacturing Portland, natural, masonry, pozzolanic, and other hydraulic cements. Cement manufacturing establishments may calcine earths or mine, quarry, manufacture, or purchase lime.
When to use a different code
Census classifies these close-sounding activities somewhere else. Businesses mainly engaged in:
- Mining or quarrying limestone are classified in U.S. Industry 212312, Crushed and Broken Limestone Mining and Quarrying.
- Manufacturing lime are classified in Industry 327410, Lime Manufacturing.
- Manufacturing ready-mix concrete are classified in Industry 327320, Ready-Mix Concrete Manufacturing.
- Manufacturing dry mix concrete are classified in U.S. Industry 327999, All Other Miscellaneous Nonmetallic Mineral Product Manufacturing.
Activities listed under 327310
The Census index assigns these 3 activities to this code. If your business matches one, this is your code.
- Cement (e.g., hydraulic, masonry, Portland, pozzolana) manufacturing
- Cement clinker manufacturing
- Natural (i.e., calcined earth) cement manufacturing
SBA size standard for 327310
To count as a small business for SBA loans and federal contracts under NAICS 327310, your business (including affiliates) must not exceed 1,000 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: 2394), so treat them as a starting point and check the definition.
- 23910Production of abrasive productsUK SIC
- 23990Manufacture of other non-metallic mineral products n.e.c.UK SIC
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.