If you are talking about the front range area also, ~3.5 million. Too many, that's why I left!
Define it 'Denver Metro Area'... do you mean the 'tri-county' area of Denver, Arapahoe, and Adams county? That would include Aurora which is almost as big as Denver itself. If you mean 'tri-county' as Denver Metro it is right around 3 million. If you mean 'Denver County' it is just at 1.5 million.
Boulder county? lol... I see you aren't from Denver. I grew up in both Denver and Aurora... nobody there would consider most of those counties in the 'Denver Metro Area'. Boulder is almost as far from Denver as NYC is from Atlantc City! Weld County? Greely! The other town Iived in Colorado. Douglas county? Maybe... That's Parker but really is on the other side of Arapahoe County from Denver.
I meant from the springs up to Ft. Collins. Way too many people for I-25 to handle!