Sharing from https://www.freeworldmaps.net/europe/ukraine/political.html to help readers find where in Ukraine people are from:
QuoteUkraine is the largest country, located at the eastern part of the continent. The country is divided administratively into twenty-four oblasts, an autonomous republic (Crimea) and two special cities (Kiev and Sevastopol).
(http://www.wellho.net/pix/oblastmap.jpg)
The 24 oblasts are (in alphabetical order): Cherkasy, Chernihiv, Chernivtsi, Dnipropetrovsk, Donetsk, Ivano-Frankivsk, Kharkiv, Kherson, Khmelnytskyi, Kiev, Kirovohrad, Luhansk, Lviv, Mykolaiv, Odessa, Poltava, Rivne, Sumy, Ternopil, Vinnytsia, Volyn, Zakarpattia, Zaporizhia, Zhytomyr
The largest cities (as shown on the map) orderted by population are: Kyiv (capital), Kharkiv, Dnipropetrovsk, Odesa, Donetsk, Zaporizhia, Lviv, Kryvyi Rih, Mykolaiv, Mariupol, Luhansk, Makiivka, Vinnytsia, Simferopol, Sevastopol, Kherson, Poltava, Chernihiv, Cherkasy, Sumy, Horlivka, Zhytomyr, Dniprodzerzhynsk, Kirovohrad, Khmelnytskyi, Rivne, Chernivtsi, Kremenchuk, Ternopil, Ivano-Frankivsk, Lutsk, Bila Tserkva, Kramatorsk, Melitopol, Kerch, Uzhhorod, Lysychansk, Konotop
See also a map of the economic areas of Ukraine at https://www.researchgate.net/figure/Map-of-economic-areas-of-Ukraine-according-to-the-location-of-regional-research-centres_fig2_347795967