NAICS & SIC Classification Reference

Find the correct NAICS or SIC code using governed definitions, inclusion and exclusion rules, and crosswalk guidance.

Established 1998 · Full NAICS & SIC coverage · Versioned standards

Browse Industry Classification Directories

Select a top-level sector to begin a structured drill-down into official industry classifications.

Browse SIC Codes

Expand a division for more industries.

01-09
Agriculture, Forestry, Fishing
01 - Agricultural Production - Crops 02 - Agricultural Production - Livestock 07 - Agricultural Services 08 - Forestry 09 - Fishing, Hunting and Trapping
10-14
Mining
10 - Metal Mining 12 - Bituminous Coal and Lignite Mining 13 - Oil and Gas Extraction 14 - Mining and Quarrying of Nonmetallic Minerals, except Fuels
15-17
Construction
15 - Building Construction General Contractors and Operative Builders 16 - Heavy Construction other than Building Construction Contractors 17 - Construction Special Trade Contractors
20-39
Manufacturing
20 - Food and Kindred Products 21 - Tobacco Products 22 - Textile Mill Products 23 - Apparel and other Finished Products Made from Fabrics and Similar Materials 24 - Lumber and Wood Products, except Furniture 25 - Furniture and Fixtures 26 - Paper and Allied Products 27 - Printing, Publishing, and Allied Industries 28 - Chemicals and Allied Products 29 - Petroleum Refining and Related Industries 30 - Rubber and Miscellaneous Plastics Products 31 - Leather and Leather Products 32 - Stone, Clay, Glass, and Concrete Products 33 - Primary Metal Industries 34 - Fabricated Metal Products, except Machinery and Transportation Equipment 35 - Industrial and Commercial Machinery and Computer Equipment 36 - Electronic and other Electrical Equipment and Components, except Computer Equipment 37 - Transportation Equipment 38 - Measuring, Analyzing, and Controlling Instruments; Photographic, Medical and Optical Goods; Watches and Clocks 39 - Miscellaneous Manufacturing Industries
40-49
Transportation & Public Utilities
40 - Railroad Transportation 41 - Local and Suburban Transit and Interurban Highway Passenger Transportation 42 - Motor Freight Transportation and Warehousing 43 - United States Postal Service 44 - Water Transportation 45 - Transportation by Air 46 - Pipelines, except Natural Gas 47 - Transportation Services 48 - Communications 49 - Electric, Gas and Sanitary Services
50-51
Wholesale Trade
50 - Wholesale Trade-Durable Goods 51 - Wholesale Trade-Nondurable Goods
52-59
Retail Trade
52 - Building Materials, Hardware, Garden Supply, and Mobile Home Dealers 53 - General Merchandise Stores 54 - Food Stores 55 - Automotive Dealers and Gasoline Service Stations 56 - Apparel and Accessory Stores 57 - Home Furniture, Furnishings, and Equipment Stores 58 - Eating and Drinking Places 59 - Miscellaneous Retail
60-67
Finance, Insurance, Real Estate
60 - Depository Institutions 61 - Non-Depository Credit Institutions 62 - Security and Commodity Brokers, Dealers, Exchanges, and Services 63 - Insurance Carriers 64 - Insurance Agents, Brokers and Service 65 - Real Estate 67 - Holding and other Investment Offices
70-89
Services
70 - Hotels, Rooming Houses, Camps, and other Lodging Places 72 - Personal Services 73 - Business Services 75 - Automotive Repair, Services, and Parking 76 - Miscellaneous Repair Services 78 - Motion Pictures 79 - Amusement and Recreation Services 80 - Health Services 81 - Legal Services 82 - Educational Services 83 - Social Services 84 - Museums, Art Galleries, and Botanical and Zoological Gardens 86 - Membership Organizations 87 - Engineering, Accounting, Research, Management, and Related Services 88 - Private Households 89 - Miscellaneous Services
91-99
Public Administration
91 - Executive, Legislative, and General Government, except Finance 92 - Justice, Public Order, and Safety 93 - Public Finance, Taxation, and Monetary Policy 94 - Administration of Human Resource Programs 95 - Administration of Environmental Quality and Housing Programs 96 - Administration of Economic Programs 97 - National Security and International Affairs 99 - Nonclassifiable Establishments
Browse NAICS Codes

Select a sector to drill down into official NAICS industries and establishment-level codes.

11
Agriculture, Forestry, Fishing, Hunting
21
Mining, Quarrying, Oil, Gas Extraction
22
Utilities
23
Construction
31-33
Manufacturing
31 - Food, Beverage, Tobacco, Apparel, Leather, & Allied Products, Textile Mills, Textile Product Mills 32 - Paper, Printing & Related Support Activities, Petroleum & Coal Products, Chemical, Plastics & Rubber Products, Nonmetallic Mineral Products 33 - Primary Metal, Fabricated Metal Products, Machinery, Computer & Electronic Products, Electrical Equipment, Appliance, & Component, Transportation Equipment, Furniture & Related Products, Miscellaneous
42
Wholesale Trade
44-45
Retail Trade
44 - Motor Vehicle & Parts Dealers, Furniture, Electronics/Appliances, Building Material, Garden Supplies, Food, Beverages, Health Care, Gas Stations 45 - Sporting Goods, Musical Instruments, Books, General Merchandise, Miscellaneous, Nonstore Retailers
48-49
Transportation and Warehousing
48 - Air, Rail, Water, Truck, Transit & Ground Passenger, Pipeline, Scenic/Sightseeing, & Support Activities 49 - Postal Service, Couriers & Messengers, Warehousing & Storage
51
Information
52
Finance and Insurance
53
Real Estate, Rental, Leasing
54
Professional, Scientific, Tech. Services
55
Mgmt. of Companies & Enterprises
56
Administrative, Support, Waste Mgmt., Remediation Services
61
Educational Services
62
Health Care and Social Assistance
71
Arts, Entertainment, Recreation
72
Accommodation and Food Services
81
Other Services (except Public Administration)
92
Public Administration

Governed SIC & NAICS Classification Reference

Maintained classification documentation, research tools, and standards-aligned guidance.

  • 10K+
    Industry Classifications & Groupings
    Industry Classifications & Groupings

    Establishment-Level Classification by SIC & NAICS

    Every business in the U.S. is classified using a SIC and NAICS code. These frameworks define establishments by standardized industry profiles, ensuring consistency across regulatory and operational data.

    • Defines establishments by standardized industry profiles
    • Supports regulatory compliance and operational data consistency
    • Enables accurate classification for analytics, reporting, and research
  • 15M+
    Establishments Referenced
    Establishments Referenced

    Applied Use: Business Intelligence & Data Services

    Optional business intelligence services built on the same governed classification framework. These services enable advanced analytics, segmentation, and outreach while remaining anchored to standardized SIC and NAICS taxonomies.

    • Identify current, specialized datasets aligned with active SIC/NAICS standards
    • Enable market segmentation, direct outreach, and analytical workflows
    • Applied datasets leverage the same governed reference standards used across SICCODE.com
  • 5.1M+
    Research Tool Uses
    Research Tool Uses

    Standardized Industry Classification Systems

    SIC and NAICS codes define a company's primary business activity. These U.S. standards provide consistent industry definitions for analytics, regulatory compliance, and institutional research.

    • SIC developed as a U.S. industry standard in 1937
    • NAICS adopted in 1997, with structured revision cycles
    • Governed under official U.S. classification protocols
    • Maintained and documented within the Classification Governance & Standards Center

Organizations Using SICCODE Classification Standards

SICCODE classification frameworks and reference data are used across government, academic, and enterprise environments to support industry classification, research, and reporting.

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Institutional Use & Reference Adoption

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