DemographicsNow is part of the Gale Databases collection. When you click on the Gale Databases link below you'll see several additional databases, including DemographicsNow.
The most important, freely-accessible source of demographic information in the United States resides with the United States Census Bureau.
Sometimes the census.gov site can be a little challenging to navigate, especially if you don't find the information you're looking for after a quick search or two. While an amazingly rich resource, this is a place where watching the tutorials can be a tremendous help.