Standard List of States/Countries

http://www.unece.org/cefact/locode/welcome.html
https://github.com/yosoyadri/GeoNames-XML-Builder/blob/master/continents-countries-statesprovinces.xml
https://github.com/yosoyadri/GeoNames-XML-Builder
http://www.geonames.org/
https://www.sqldumpster.com/databases/geographic/


Source:
https://stackoverflow.com/questions/9627654/where-can-i-get-a-list-of-countries-states-and-cities