There are many regions in the US, not just two. For example the Northeast and the Southeast.
South and West
The Southwest and Southeast are the warmest regions in the US. However, out of the four regions defined by the census bureau, the West and South would have to be the warmest.
The regions of the Southern US (16) and the Western US (13) have the most combined states: 29.
Appalachian and Rocky Mountains.
The two largest land form regions in the US are the Rocky Mountains and the Appalachian Mountains. In Canada, the largest land form region is called the Maritime terrains.
There are approximately 10 federal regions in the US. The census has four regions. The federal reserve also has 12 regions.
tornado alley, okalahoma etc in that area
rtyery
Scandinavia has the slowest population of growth.
The regions of the US (as defined by the US Census Bureau) are the West, South, Midwest, and Northeast.
The four regions on the US are the West, Midwest, South, and Northeast.