Massacheusetts is almost 200 miles wide, I'm having a little bit of trouble picturing places that are that far removed from the nearest town outside of places like the empty parts of Nevada or Wyoming.
I guess it depends on your definition of "nearest town". By the official "settlement hierarchy", in which a thousand souls or more comprise a town, that's true. Once you get into 20k or 30k, though, it's pretty easy to find places in the West or Midwest that are more than 200 miles from the nearest town of that size.
Also I don't have any GIS tools handy but I started poking around with google maps and 200 miles is a long way even in the west, It looks like all of Nebraska is within 200 miles of a 20k city, and so is almost all of Texas except maybe down by Big Bend.