Nice NYT infographic/Map showing the regional differences between bigger (TBTF) banks and the smaller regional banks.

click or ginormous map
^[1]

Of course, looking at a map shows you land mass, not population, Most of the non-coastal western third of the country is very lightly populated.

When you look at the map above, you should also consider a cartograph like this:

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^[2]
via Worldmapper ^[2]

The above map is an “equal area cartogram,”  also known as density-equalising maps. The cartogram re-sizes each territory according to the variable being mapped.

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Source:
Metrics A Banking Battleground ^[1]
NYT, March 7, 2010
http://www.nytimes.com/interactive/2010/03/07/business/07metricsg.html