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### Census Instructions

### Also in this Section:

                          - 2020 Instructions
                          - 2010 Instructions
                          - 2000 Instructions
                          - 1990 Instructions
                          - 1980 Instructions
                          - 1950 Instructions
                          - 1940 Instructions
                          - 1930 Instructions
                          - 1920 Instructions
                          - 1910 Instructions
                          - 1900 Instructions
                          - 1890 Instructions
                          - 1880 Instructions
                          - 1870 Instructions
                          - 1860 Instructions
                          - 1850 Instructions
                          - 1790 Instructions

## 1990 Instructions

Like the 1980 census, the majority of households were enumerated in 1990 by mail.  Questionnaires were delivered to every occupied housing unit.  Households returned their completed questionnaires to the U.S. Census Bureau using the provided postage-paid envelope.  Although the majority of households were counted by mail, the Census Bureau still employed approximately 510,000 enumerators to count hard-to-reach populations and households that did not return their questionnaire by mail.

**1990 Instructions**

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Measuring America's People, Places, and Economy

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