The Census has just released its population estimates for 2006. Here's a list of the nation's top 20 metros for 2006. Click here for the story in USA Today. Here for the Census Bureau's press release (hat tip: Kevin Stolarick, Steven Pedigo). But do remember that population growth, while interesting is a crude indicator of development. Places can gain population and lose income and wealth. We have a paper coming on just this issue shortly so stay tuned.