The rust belt?
The county I grew up in (Erie Co, NY) is smaller than it was when I was there and has seen a nearly 20% decline since 1970.
Interestingly, the western part of the state is losing more than NYC can attract new people, so the population of NY State as a whole is declining.
http://www.bizjournals.com/buffalo/stories/2007/03/19/daily30.html?from_rss=1