Do you need counts of people living in certain types of households or average household size? The Supplemental Demographic and Housing Characteristics File (S-DHC) is the only 2020 Census data product that provides this information. An earlier 2020 Census data product, the Demographic and Housing Characteristics File (DHC), provides counts of households mostly separate from counts of people.  S-DHC tables are only available at the national and state level.

Do you need detailed race and ethnicity data on people and households? Many S-DHC tables are available by nine race and Hispanic origin groups, however, the S-DHC does not provide data on detailed race and ethnicity groups nor American Indian and Alaska Native tribes and villages. The Detailed DHC-A and Detailed DHC-B provide demographic and household data on these detailed race and ethnicity groups.

Do you need data at lower levels of geography, like county, city, or census tract? The S-DHC does not provide data below the state level, but many other 2020 Census data products do. View a summary of these products and their levels of geographies on the About 2020 Census Data Products webpage. If you need average household size for total population or by certain characteristics, they can be created using DHC data although there are some limitations. For more guidance on this, reference this fact sheet.

In addition, certain American Community Survey (ACS) tables provide substate sample estimates for similar data subjects to those in the S-DHC. Some examples are:

• S1101 Households and Families
• B11003 Family Type by Presence and Age of Own Children Under 18 Years
• B25008 Total Population in Occupied Housing Units by Tenure
• B25010 Average Household Size of Occupied Housing Units by Tenure

Do you need redistricting data? The 2020 Census Redistricting Data (P.L. 94-171) Summary File consists of six tables that together provide demographic and housing characteristics for selected topics: voting age, race, Hispanic or Latino origin, housing occupancy status, and group quarters population by major group quarters type.

Do you need microdata from the 2020 Census? The 2020 Census Privacy-Protected Microdata File (PPMF)  provides all privacy-protected records from the 2020 Census. The PPMF incorporates all data included in the 2020 Census Redistricting Data (P.L. 94-171) Summary File, DHC, and Demographic Profile.

The 2020 S-DHC tables were provided in the 2010 Census Summary File 1 (SF1). The S-DHC tables supplement the data released in the 2020 Demographic and Housing Characteristics File (DHC), the successor to the 2010 SF1.

For information about how specific tables and geographies differ from the 2010 Census, download the 2020 Census Data Product Planning Crosswalk. Navigate to the “S-DHC Crosswalk” tab to find the 2010 to 2020 comparison or the “S-DHC Tables” tab to view the 2020 table shells.

The Demographic Profile may provide data in the format you need. Rather than multiple tables like other 2020 Census data products, the Demographic Profile presents an overview of demographic and housing characteristics for a specific geography, all in a single table.

Please note that the Demographic Profile provides less detailed data than the Detailed DHC-B, Detailed DHC-A, and DHC. Access the Demographic Profile.