Overpass Turbo query for city/voivodeship/city hierarchy in poly

Here is an example for municipalities in "Lower Silesian" in Poland:

[out:json][timeout:120];
{{geocodeArea:Lower Silesian}}->.searchArea;
(
  relation["admin_level"="7"](area.searchArea);
);
// print results
out body;
>;
out skel qt;

If the voivodeship has its municipalities or cities as ways instead of relations, just change "relation" to "way" in the code above.

If you really only want cities instead of municipalities, change the admin level from 7 to 8 (might time out). If you want this query for another country (you didn't specify), take a look at this table to see which admin level you need:

Tag:boundary=administrative