I'll fill this in over time.
Adninistrative Divisions of the Iberian Confederation
The Confederation consists of:
-Eight states, with significant devolution of local powers and a high degree of internal autonomy. State boundaries reflect historical national boundaries (in Europe) and former colonial regions (captaincy-generals) that have since attained statehood.
-Four captaincy-generals, with limited autonomy as a result of small or under-developed populations. In time, it would be expected that each would become a state. For now, a great deal of governance is directed from Madrid.
Population as of 1940 (Thanks to Brock for the original research)
Europe:
Spain: 25,878,000
Portugal: 7,760,000
Europe Total: 33,638,000
The Americas:
Cuba: 4,291,100
Santo Domingo (Hispaniola): 4,425,000
San Juan Bautista (Puerto Rico): 1,869,300
Guatemala (includes Belize, Honduras, El Salvador, Nicaragua, Costa Rica): 5,177,000
Captaincy-General of Panama: 620,000
Ecuador: 2,466,000
Americas Total: 20,160,600
Africa:
Captaincy-General of Sierra Leona (includes Liberia): 2,633,000
Captaincy-General of Angola: 3,740,800
Africa Total: 6,373,800
Asia:
San Hainando: 8,000,000
Captaincy-General of Macau: 374,700
Asia Total: 8,374,700
Confederation Total: 68,547,100
Note on Geography
The existence of Atlantis in Wesworld means that the Canary Islands are Atlantean, rather than Iberian.