US: Abandoned Places and Things

Flickr: Abandoned America
Flickr: Anything Abandoned - US focused.
Flickr: The Fading History of America

Flickr: Texas Ghost Towns  

Abandoned Ohio
Forgotten Ohio

Dark Passage - New York based.
Flickr: Abandoned New York State 
Flickr: Abandoned Railway Bridges of NY  

Opacity - New England based.

Modern Ruins - Mid Atlantic.

Flickr: Abandoned North Carolina

Chicago - Now Demolished, Lost, Destroyed, Razed
Flickr: Vanishing Chicago
Flickr: Chicago Urbex and Photography Group

Rural Decay Wisconsin
Flickr: Wisconsin Urbex

Abandoned Ok - Oklahoma.

Flickr: Abandoned San Diego Flickr Meetup

Flickr: Abandoned New Mexico

Flickr: Abandoned Florida

Flickr: Ghost Towns - The American West.
Flickr: Ghost Towns West Coast - US West Coast States.

Flickr: Silent Decay USA: North
Flickr: Silent Decay USA: North-East

Abandoned but not Forgotten - Site is down.

Flickr: Old American Department Stores  
Flickr: Historic Hotels of America