“We are not the wide-open spaces anymore,” said Martha Farnsworth Riche, who headed the Census Bureau in the mid-1990s and is now a research demographer at Cornell University. “Our choices are constrained.”
Whenever someone complains about a lack of room in the United States I always recommend driving I-15 from Las Vegas to well, anywhere north of Las Vegas. By the time you get to Utah my point should be made, but southern Idaho and Montana are quite nice too, might as well see that.
Sure it’s nicer weather on the coasts, mostly, and our economy is centered there, but that doesn’t mean we can’t grow inland, we just don’t want to.
Not So Fast 
Exactly! People that claim over-crowding always make me laugh.
An actual conversation I had recently:
“America is becoming overcrowded.”
“Ever hear of the state of Idaho?”
“Even Boise’s probably getting crowded.”
Cause… you know… if it’s not a city (and by definition crowded), it doesn’t exist…
Yeah, Boise has what, a million people? If only there was room for the city to spread out into.