Where is the best place to get geolocation data?

Question

Geolocation

It is necessary to make a service in which certain enterprises will be linked to the city on the map.
I take the list of enterprises by API.
I need all the cities of Ukraine, I will use them to determine the extreme points on the map so that the map does not scroll beyond these points.
But where is the MOST CORRECT to take a list of cities for which I will determine the coordinates?
That is, of course, in theory, you can parse from the website of Ukrposhta, new mail, from Wikipedia. But where is the best way to do this, so that in the end you can declare about the official source of data? It’s like there are a thousand cities in Ukraine, because they say so ... Avito or what?
Maybe some stat.organ, or somewhere on the website of which ministry, or where to get them?