You could go to the census fact finder, grab some data (scoped at census block level) and a few census block shapefiles for your state, and get to work. Repeat for counties, cities, etc. Census data is seriously cool, and easy to work with.

[0] http://factfinder.census.gov/faces/nav/jsf/pages/index.xhtml

[1] https://www.census.gov/cgi-bin/geo/shapefiles/index.php