The Census Bureau produces publications covering issues as diverse as baby boomers, biking or walking to work, medical services utilization, rental housing markets, and school aged children with disabilities. Check to see if there's a publication of interest to you.
Visit the main Census History page for a variety of materials: genealogical research, histories of the individual censuses (decennial, government, etc.), and educational resources.
Population Shift to the West and South
From the Census Bureau web site, 6/2014
The links presented below provide access to freely accessible Census Bureau datasets. Restricted datasets are available to qualified researchers through Census Bureau Research Data Centers.