User blog comment:Mmpratt99 deviantart/I Need a Good Original Name For An Alternate United States/@comment-25052433-20150530210017

Republic of the Americas

New Brittain

The New States

United Kingdom of America

Just a few that come to mind right off the top.

One great point of reference for an alternate United States is The Long Walk by Stephen King. The essential back plot is that the allies lost World War 2. They hint at this a lot throughout the story, but you might miss it if you weren't really looking.

If you are going for a new America, just think of what would happen if certain key events in hisoty were changed, and the impact it would have on how we shaped and defined our nation.