The 'Bat'kivshchyna' political party, the mainstay of BYuT, claim to now have nearly half a million paid-up members in Ukraine.
They are quite evenly scattered throughout all of Ukraine's oblasts, and there are some surprises, e.g. they have 7888 and 15720 members in the western Ukrainian Ternopil and Volyn oblasts respectively, whilst for the east Ukrainian Donetsk and Lugansk oblasts the figures are 9566 and 15390 members respectively.
Eastern Ukraine is of course more heavily populated that its western regions, but nevertheless, BYuT is the only party whose membership comprehensively covers the country.
They seem to be particularly strong in central regions, e.g. nearly 34000 members in Kirovohrad oblast, and 28241 members in Dnipropetrovsk oblast.