A huge amount of data is available in over 130 countries. To learn what data is available where, take a look at the coverage map for the Esri Demographics and explore data collections with the data browser.
You can also find what data is available using the REST service itself. Passing a country code to the REST service at the
/DataCollections endpoint will return all available Data Collections for that country. For example, a
Will return all the Data Collections available in the United States.