The American History Demographic Chart Book is a website featuring dozens of graphics about US demographics from 1790 through 2010. The site is divided into seventeen chapters each containing multiple dynamic graphics. The chapters are labeled according to demographic categories such as age, marital status, education, and birthplace.

H/T to US History Teachers Blog.

Applications for Education
Examining how demographic data has changed over the course of US History can be a good way for students to  explore the causes of events and eras in US History. The American History Demographic Chart Book puts all of that data in one place for students to explore.