How many Americans have a passport? This was the question a British friend asked me one day, probably based upon an assumption that much of the world has about Americans, which is that the majority of U.S. citizens do not have passports, and therefore cannot travel outside its borders. I had no idea what the answer was, so I decided to do a little research, and the answer is somewhat surprising.
Source: How Many Americans Have A Passport? – The Expeditioner