I've thought about this before but tis late and I am tired. Here's what I have to say (I might regret this later, please forgive if I am making stupid assumptions.)
It seems many Eastern Asian countries, like Japan, Korea, China, have very strict, SJ-type mentalities. ("The sunflower that sticks out gets its head chopped off.") However I also think many other Southeastern/Eastern Asian countries, especially those with strong Buddhist roots, have many idealistic (NF) traits. So I am not sure which takes dominance...
Europe... I haven't been to enough of but the Scandinavian countries I've been to also share a very SJ type mentality. Which isn't a bad way to run a country per say.
I haven't traveled very much so there isn't much else I can think of saying. >.> But I tried.
America, well...heh, we should do states and types as well! XD Is California an ESFP? New York an INTJ? This could be interesting...