Some Census boundary sources provide Census variables already included as attributes, while some provide boundary files with only geographic identifiers in the attribute table.
It may be necessary to download a demographics data table and then join it to corresponding spatial boundaries in order to make a map.
*Census Boundaries from Esri (limited attributes are included, such as population, age, race, sex, and housing - no income or education variables)
Important note about the Esri data: The lineage of these data include TomTom North America Inc., Geographic Data Technology Inc., TeleAtlas and Esri. Like all spatial data, features from different sources will contain variations due to data lineage and processing steps. Consult metadata for more information.