This apparently random rumination springs from comments Indianapolis-based Generik420 makes on my "beer regions" post below. He rightly points out that state lines are a crude measure. In the Midwest, Chicago and Indianapolis are culturally part of the Upper Midwest; the lower half of these states drift culturally toward Dixie.
The Indianapolis metro area comprises almost 1/3 of the population of the state and is located almost dead center in the middle, and is close to the density you used for the Beer Midwest states. Of interest to me is the fact that of the 28 breweries in Indiana, 20 of them are in the northern half. I also happen to know that there are 2 new breweries set to open within the next few months in the northern half.I totally agree. This is exactly why I was trying to map regions--state lines are a crude measure and fail to capture cultural, beeriological (I may have coined a term here) geography. The upper midwest is definitely steeped in beer culture, but the definition of that region cuts through some states and loops together several.
I don't have true figures for this, but I feel fairly comfortable saying that most of the Illinois brewing capacity is occuring around the Chicagoland area which again is the northern area of Illinois.
But it got me thinking. Portland is regularly cited as the best beer city in the country. There are other contenders, but you understand the point. It is in any case the most-breweried. Yet Portland's share of Oregon breweries is modest. As Generik points out, 71% of Indiana's breweries are in Indianapolis. Only 40% of Oregon's breweries are in Portland (38 of 96). This is a rather remarkable fact: the most breweried-city in the country has a minority of the breweries in its own state.
You drive to most any Oregon town of 10,000 people or more, and you'll find a brewery. This is a marker of the penetration of beer culture into mass culture in the Northwest (the Washington Brewers Guild doesn't keep the same handy stats, but Seattle's share of WA breweries is probably roughly similar to Oregon's). Craft brewing is not an urban phenomenon--it's a regional one. We have passed a tipping point and now good beer is just part of the cultural tapestry.
Numbers don't tell you the whole picture, but sometimes they can point you to in the right direction.
Photo of Pelican Brewery courtesy of Travel Oregon.