Reply #13: No. If you don't know that, you've never tried to leave or go to the US on a driver's license.

[Berry Cool]

In the days before you actually had to have a passport card or a passport book to visit Canada and be let back into the US, a driver's license was not considered proof of citizenship. If you were a US citizen and you didn't have a passport, you had to produce a birth certificate. A driver's license wouldn't cut it.

Now, it's true that many people crossing the US-Canada border in private vehicles were only quizzed verbally about their citizenship and if they said "US" and were in a vehicle with US plates, they oftentimes were not asked to produce proof. But if you were going over on a bus or train, oh my goodness, you better have that birth certificate or else.

Of course, those days are gone now and you need a passport card, at least, to cross the Canadian border.

Edited to specify: You need only a passport card to travel by land, but the book to travel by air.