The following is a complete list of the Provinces of the North American Union. Many are direct analogs to OTLU.S. states and Canadian provinces. Many others do not. Those provinces that are settings in the novel have separate articles.
Albertus - OTL Alberta and central-west Montana (excluding the western most tip).
Baffin - OTL Northwest Territories (less SE section) and NW section of Nunavut and all of Victoria and King William Islands.
Florida - OTL Florida with the panhandle extended west through the southern portions of Alabama and Mississippi bordering the Gulf of Mexico to the Florida Parishes of Louisiana. The Bahamas, which are not labeled separately on the map, may be part of Florida as well.