From the About section:
"StatisticalAtlas.com is a website dedicated to satisfying all your cravings for in-depth statistical data and analysis for all of the US. Get high-level overviews for the entire country, then drill down through 10+ map levels, all the way down to the individual block. The site is heavily cross-linked for convenient click-and-scroll navigation, and we invite you to explore all the different topics across all the different map levels."
As of August 2015, the site includes information from the 2010 census and the 2009-2013 American Communicty Survey.