Territorial changes of Polish Voivodeships on April 1, 1938
On April 1, 1938, borders of several western and central Voivodeships of the Second Polish Republic changed considerably. This included such Voivodeships as Pomerania, Poznan, Warsaw, Lodz, Bialystok, Lublin and Kielce. Pomerania gained most, while Bialystok lost most. This is the alphabetical list of powiats, which were then moved from one Voivodeship to another:
- powiat bydgoski - Bydgoszcz County,
- powiat dzialdowski - Działdowo County,
- powiat garwolinski - Garwolin County,
- powiat inowroclawski - Inowrocław County,
- powiat kaliski - Kalisz County,
- powiat kolski - Koło County,
- powiat konecki - Końskie County,
- powiat koninski - Konin County,
- powiat kutnowski - Kutno County,
- powiat lipnowski - Lipno County,
- powiat lomzynski - Łomża County,
- powiat lowicki - Łowicz County,
- powiat nieszawski - Nieszawa county,
- powiat opoczynski - Opoczno County,
- powiat ostrolecki - Ostrołęka county,
- powiat ostrowski - Ostrów Mazowiecka county,
- powiat rawski - Rawa Mazowiecka county,
- powiat rypinski - Rypin county,
- powiat skierniewicki - Skierniewice county,
- powiat sokolowski - Sokołów Podlaski county,
- powiat szubinski - Szubin county,
- powiat turecki - Turek County,
- powiat wegrowski - Węgrów County,
- powiat wloclawski - Włocławek county,
- powiat wyrzyski - Wyrzysk county.
