A researcher at the University of Virginia's Demographics Research Group has taken 2010 census data and programmed it into an interactive map, with one dot representing each person counted in the census—that's 308,745,538 dots.
You can look at the entire U.S. and notice that the West is much more sparsely populated than the East. There just aren't as many people in, say, North Dakota as in Michigan or New York. Even zoomed out this far, you can see that there are a lot of blue dots (representing whites) in most of the country, and a lot of green dots (representing Blacks) in the South and Southeast.
|Racial Dot Map, U.S.|
You can zoom in anywhere you want. Here's Shiprock, Arizona, in the Navajo Nation, showing mostly brown dots, representing "Other Race/Native American/Multi-racial"—in this case, Native American.
|Racial Dot Map, Shiprock, AZ|
Coming to our own corner of the country, here's Washington State, with a lot of population along the I-5 corridor and in Spokane, and much less population density in the rest of the state:
|Racial Dot Map, Washington State|
|Racial Dot Map, Seattle Area|
|Racial Dot Map showing University District (top, with high concentration of red dots, representing Asians), Eastlake and Capitol Hill (center), and Central Area (with more green dots, representing Blacks)|
For more about the project, see U.Va. researcher’s dot map of race wins praise, Richmond Times-Dispatch, Sept. 9, 2013, as well as the map's home page.