Where do I get demographic data and authoritative content to support analysis?

Esri maintain a rich collection of demographic data from reputable data providers. Information about a large portion the demographic data that Esri maintains can be found through this Esri website.

One collection among many is authoritative geographic content of Designated Marketing Areas. These are typically refereed to as DMAs. DMAs are packaged with Esri demographic data.

Demographic data is available offline though Esri Business Analyst Desktop Basic or Standard

Demographic data is available online through ArcGIS Online specifically though this REST endpoint

*this data can be easily viewed by adding this URL into the ArcGIS Online Map Viewer found here