NAICS Codes | The Curry Group
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North American Industry Classification System – NAICS

To learn more about NAICS Codes, please visit the official government site

The North American Industry Classification System (NAICS) is the standard used by Federal statistical agencies in classifying business establishments for the purpose of collecting, analyzing, and publishing statistical data related to the U.S. business economy.


NAICS was developed under the auspices of the Office of Management and Budget (OMB), and adopted in 1997 to replace the Standard Industrial Classification (SIC) system. It was developed jointly by the U.S. Economic Classification Policy Committee (ECPC), Statistics Canada, and Mexico’s Instituto Nacional de Estadistica y Geografia, to allow for a high level of comparability in business statistics among the North American countries.


This official U.S. Government Web site provides the latest information on plans for NAICS revisions, as well as access to various NAICS reference files and tools. Additional information on the background and development of NAICS is available in the
section of this Web site.

December 21, 2021 [PDF, 203KB] North American Industry Classification System—Revision for 2022; Update of Statistical Policy Directive No. 8, North American Industry Classification System: Classification of Establishments; and Elimination of Statistical Policy Directive No. 9, Standard Industrial Classification of Enterprises; Notice. Vol. 86, No. 242



221113 Nuclear Electric Power Generation
221320   Sewage Treatment Facilities
236220   Commercial and Institutional Building Construction
237110   Water and Sewer Line and Related Structures Construction
237120   Oil and Gas Pipeline and Related Structures Construction
237130   Power and Communication Line and Related Structures Construction
237210   Land Subdivision
237310   Highway, Street, and Bridge Construction
237990   Other Heavy and Civil Engineering Construction
238910   Site Preparation Contractors
333613   Mechanical Power Transmission Equipment Manufacturing
335311   Power, Distribution, and Specialty Transformer Manufacturing
336510   Railroad Rolling Stock Manufacturing
482111   Line-Haul Railroads
482112   Short Line Railroads
486210   Pipeline Transportation of Natural Gas
488111   Air Traffic Control
488119   Other Airport Operations
488210   Support Activities for Rail Transportation
541310   Architectural Services
541320   Landscape Architectural Services
541330 YES Engineering Services
541360   Geophysical Surveying and Mapping Services
541611   Administrative Management and General Management Consulting Services
541620   Environmental Consulting Services
541990   All Other Professional, Scientific, and Technical Services
561210   Facilities Support Services
562211   Hazardous Waste Treatment and Disposal
611512   Flight Training

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