“Starbucks has been used in the past to gauge economic health, and I’ve found it used as a standard metric in geography classes,” writes Davenport, a Ph.D. candidate at the University of Washington’s astronomy department, on his blog ifweassume.com. “The closer you live to a Starbucks the higher your rent is likely to be, and in NYC the density of locations can reach as high as 150 with a radius of 5 miles!”
And so the map seen above shows all the company-owned Starbucks in the U.S. linked using a Delaunay triangulation. According to that map, the longest distance from one of these stores appears to be about 140 miles.
However, while the map does account for around 85% of Starbucks locations, it doesn’t include those franchised ‘bucks like the ones you see in airports and inside of grocery stores. So it’s possible that the longest trip to a Starbucks could be even shorter.
Using census data, Davenport then figured out how close most of us are likely to live to a Starbucks. According to his findings, more than 30% of Americans live within a single mile of a Starbucks, while more than 60% are within 10 miles of one. And by the time you get out to 20 miles, that covers a whopping 80% of the country’s population, approximately 250,000,000 people.