Because the industry and occupation classifications have changed over time, crosswalks have been developed to facilitate analysis of data across classification systems. Occupation classifications are derived from the Standard Occupational Classification (SOC) system. Industry classifications are derived from the North American Industrial Classification System (NAICS).

The most recent code lists and crosswalks are available for download. Data users accessing the Public Use Microdata Sample (PUMS), should refer to the appropriate PUMS code list.

Industry

Occupation

2018 Census Occupation Code Lists (Derived from the 2018 SOC)

2018 Census Occupation Code List with Crosswalk [<1.0 MB]

2018 Census STEM, STEM-Related and Non-STEM related Code List [<1.0 MB]

User's Guide to American Community Survey Published Occupation Tables [<1.0 MB]

2018 ACS PUMS and 2018 SIPP Public Use Occupation Code List [< 1.0 MB]

2010 Census Occupation Code Lists (Derived from the 2010 SOC)

2010 Census Occupation Codes with Crosswalk [<1.0 MB]

2006-2010 ACS PUMS Occupation Conversion Rates (2002 to 2010 Occupation Census codes) [<1.0 MB]

2013 ACS 1-year and 2014 SIPP PUMS Occupation Code List [<1.0 MB]

2010 Census Occupation Codes (Spanish version) [<1.0 MB]

2002 Census Occupation Code Lists (Derived from the 2000 SOC)

2002 Census Occupation Codes [<1.0 MB]

2008 SIPP PUMS Occupation Code List [<1.0 MB]

Older Census Occupation Code Lists

Census 2000 Occupational Classification System and Crosswalk to Standard Occupational Classification (SOC) [<1.0 MB]

1997 SOC to 1980 SOC Crosslist [3.5 MB]

1980 SOC to 1997 SOC Crosslist [3.3 MB]

1970 Industry and Occupation Code List [<1.0 MB]

Publication

Changes in the Census Industry and Occupation Classification Systems

March 27, 2020

This report describes the most recent changes in the Census industry and occupation classification systems.

Publication

The Relationship Between The 1990 Census and Census 2000

October 30, 2003

This paper describes the changes in the industry and occupation classification systems.

Occupation Crosswalks for Comparing Data from 1990 - 2000 Census

Instructions for Creating 1990-2000 Occupation Crosswalks, Using Input to the Occupation Crosswalk Template [2.3 MB]

Template for Converting 1990 Census STF-3 Occupation Categories to Census 2000 SF-3 Occupation Categories; SF-3 Detailed and Quick Table Profiles [<1.0 MB]

North American Industry Classification System (NAICS) Revision Process

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. To obtain detailed information on the structure of NAICS and revision process, please visit the following webpage:

2018 Standard Occupational Classification (SOC) Revision Process

The Standard Occupational Classification, or SOC, helps ensure that occupational data produced across the Federal statistical system are comparable and can be used together in analysis. To reflect changes in the economy and the nature of work, the SOC must be revised periodically. Input from the public is a key part of the revision process. To obtain information on the completed revision process for the 2018 Standard Occupation Classification (SOC), data users can access the following webpages from the Bureau of Labor Statistics:

Revising the Standard Occupational Classification (SOC) 2018 [<1.0 MB]