Here is a map from the world of Retrotropia, as sketched out by John Michael Greer, in his online series of 2015. Click on the map for a larger version.
A larger map, including Canada, is below (to show the full extent of the Republic of New England and the Maritimes). Again, click on the map for a larger version.
There are some folks who have ideas on what the other parts of Canada are doing (as well as Hawaii and Alaska), but that isn’t part of the ‘canon’ (as of yet!).