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OSHA SIC Manual — Standard Industrial Classification Directory

The Standard Industrial Classification (SIC) system is the official 1987 public-domain U.S. government taxonomy of 4-digit numeric codes maintained by OSHA and the U.S. Census Bureau. Independent reference directory to search and browse all 1,004 active 4-digit codes from the official OSHA SIC Manual across 10 Divisions and 83 Major Groups.

Select Industry Division & Major Group

Division E: Transportation, Communications, Electric, Gas, and Sanitary Services

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 →

Division F: Wholesale Trade

50 Wholesale Trade - Durable Goods →51 Wholesale Trade - Nondurable Goods →

Division G: 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 →

Division H: Finance, Insurance, and Real Estate

60 Depository Institutions →61 Nondepository 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 →

Division I: 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, Botanical and Zoological Gardens →86 Membership Organizations →87 Engineering, Accounting, Research, Management, and Related Services →88 Private Households →89 Services, Not Elsewhere Classified →

Division J: 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 →

What is the OSHA SIC Manual?

Published by the Executive Office of the President OMB and hosted by the Department of Labor (OSHA SIC Manual), the Standard Industrial Classification framework groups establishments by output. While federal statistical reporting transitioned to NAICS in 1997, 4-digit SIC codes remain legally active for OSHA workplace safety monitoring (29 CFR Part 1904), SEC EDGAR corporate filings, Dun & Bradstreet credit records, and workers' compensation insurance.

Use our SIC to NAICS Transitive Crosswalk to convert any 4-digit SIC code to modern 6-digit 2022 NAICS classifications.

→ Transitive Crosswalk Tool → 2022 NAICS Directory → Smart Code Finder → Complete SIC Guide

Frequently Asked Questions

What is the OSHA SIC Manual? ▾

The OSHA SIC Manual is the official public-domain Standard Industrial Classification framework published by the U.S. Department of Labor (OSHA) and OMB to classify business establishment operations by industry output.

Is the SIC system still used by OSHA and government registers? ▾

Yes. While federal statistical reporting transitioned to NAICS in 1997, legacy 4-digit SIC codes from the OSHA SIC manual remain actively required for OSHA workplace safety log recordkeeping (Form 300), SEC EDGAR public filings, credit bureaus (Dun & Bradstreet), and workers' compensation insurance.

What is the difference between SIC and NAICS codes? ▾

SIC codes classify establishments based on final product output or market destination (what businesses sell), whereas modern NAICS codes classify establishments based on production processes and operational inputs (how businesses work).

Official Source Citation: OSHA / Executive Office of the President 1987 SIC Manual. Public-domain classification reference.