The Census Bureau has created some slick looking maps and charts with new 2010 Census data. There’s a national map that shows change in population, change in congressional apportionment, and population density by state, along with population change charts for the past 100 years.
There are also state level maps that show change in population between 2000 and 2010 at the county level for total population and population by race and Hispanic / Latino origin. As of this post there are only 4 states available (New York isn’t ready yet, but you can check out Jersey); all the state level maps should be released by April 1st.
These maps were designed to be used as “widgets”. There’s some html code below each one that you can copy and paste into a web page, allowing you to embed a particular map on your web site. This blog doesn’t support the particular code; otherwise I’d embed one here. It does work in LibGuides however, if you’re using a wide page layout (two columns instead of three).
Take a look here: http://2010.census.gov/2010census/data/