There are about 40 countries that use FPTP voting in its pure form.. and about 25 more countries that use it in a mixed form with other methods.
Oddly those 40 countries despite using FPTP just like the USA do not tend to have 2-party systems... because its a myth. America is only different because it gives the illusion i described earlier which is only because people buy the myth at all. In these other 40 countries though because that myth isnt really one that is "sold" you dont get the 2-party system you get here.