Google Developer Console -> Statistics

[AC Question]

TOTAL INSTALLS BY USER BY COUNTRY
some installs are just listed as "Others"
Which countries are bundled together as others?

 

[mdxyz]

That depends on your specific case, but basically all the countries that do not show up above.
If you want to see all countries, export the data as CSV (there is a link in the top right) and have a look at it in Google Docs, Excel, or similar. Unfortunately the statistics interface in the developer console is somewhat limited but at least they give you access to the raw data.