User blog comment:LondonDauntlessCorvair963/Cool Facts About Random Stuff/@comment-5510093-20131228184955/@comment-7855039-20131229001915

Well, according to that Wikipedia page:

"The metric system has been officially sanctioned for use in the United States since 1866, but it remains the only industrialized country  that has not adopted the metric system as its official system of measurement."

Note the part that says "industrialized country." There are some countries that are not industrialized but still haven't adopted the metric system (like Jamaica). The U.S. is just the only industrialized (or developed) country who hasn't.

If you look at this Wikipedia page, it lists all of the countries that don't use Celcius and use Farenheit.

"Fahrenheit remains the official scale for the following countries: Jamaica , the Cayman Islands ,  Belize ,  the  Bahamas ,  Palau , and the  United States of America  and associated territories."

So yeah.