I came across this Singles Map of the United States on Boston.com. The data indicate that in most East Coast cities, single women outnumber single men, whereas the opposite is true for the West Coast. I guess they don't call it Man Diego for nothing!
Naturally, the Globe couldn't post an article like this without throwing in a dash of 1950's sexism:
"One reason young women in the prime marriage years - the 25-44 age range - flock to big cities is to compete for the most eligible men." Yeah, right after we go to college to get our Mrs. degrees, AMIRITE?
They then go on to explain that men move to the West Coast for job opportunities. Oh, exactly.