Originally Posted by
Bear96
Exceedingly few. How many sizeable towns are at 12,000'?
IIRC, Leadville, CO is the highest incorporated town in the US at 10,152'. It has about 2800 people.
But looking outside of the US it's easy to find large populations at altitude.
La Rinconada, Peru: 16,732 with ~50,000 people
Nagqu, Tibet: 14,800 with ~42,000 people
Juliaca, Peru: 12,546 with ~216,000 people
Cusco, Peru:11,152 with ~428,000 people
El Alto, Bolivia: 13,620 with ~846,000 people
Quite a few more of varying sizes:
https://en.wikipedia.org/wiki/List_of_highest_cities