Tucker County, West Virginia is the least diverse place in America. Cue the eye rolls.

[youtube http://www.youtube.com/watch?v=2HcUILnuFag&w=620&h=315] Randy Olson -- a true "data visualization" guy -- put in some work on the diversity of every county in the United States. There's some detail on it here, and on his own blog here. Here's how the process worked:

To calculate racial diversity, I computed the entropy on the “% ethnicity” data …