I was going to move directly to metropolitan areas, but thought I would detour first to those congregations that are neither in metropolitan or micropolitan areas. That is, rural churches. These are very few -- only about 5% of all Unitarian Universalists congregations -- and most (from personal knowledge) are in small towns, not in open country. Indeed, I was ordained by one, in Canon, Georgia.
The full list, plus notes, below the fold.