The Masovian Voivodeship was a voivodeship of the Congress Poland, that existed from 1816 to 1837. Its capital was Warsaw. It was established on 16 January 1816, from the Warsaw Department and the three counties of the Bydgoszcz Department,Dziennik Praw Królestwa Polskiego, no 2. vol. 1. Warsaw. 1816. p. 115-120. and existed until 23 February 1837, when it was replaced by the Masovian Governorate.Jliusz Bardach; Monika Senkowska-Gluck (editor): Historia państwa i prawa Polski, Tom III od rozbiorów do uwłaszczenia. Warsaw: PWN, 1981, p. 354. ISBN 83-01-02658-8. During the January Uprising, the Polish National Government, announced the re-establishment of the voivodeships with the borders from 1816, reestablishing the administration of the Masovian Voivodeship within the part of Warsaw Governorate. It existed from 1863 to 1864, when it was abolished, and replaced by the Warsaw Governorate.Dorota Lewandowska: Organizacja Narodowa Powstania Styczniowego z lat 1861-1864. Archiwum Główne Akt Dawnych.
Subdivisions Gostynin District (seat: Kutno) Gostynin County (seat: Gostynin) Orłów County (seat: Kutno) Kuyavian District (seat: Włocławek) Brześć Kujawski County (seat: Włocławek) Kowal County (seat: Kowal) Radziejów County (seat: Radziejów) Łęczyca District (seat: Łęczyca) Łęczyca County (seat: Łęczyca) Zgierz County (seat: Zgierz) Rawa District (seat: Rawa) Brzeziny County (seat: Brzeziny Rawa County (seat: Rawa) Sochaczew District (seat: Sochaczew) Sochaczew County (seat: (Sochaczew) Stanisławów District (seat: Mińsk Mazowiecki) Siennica County (seat: Siennica) Stanisławów County (seat: Stanisławów) Warsaw District Błonie County (seat: Błonie) Czersk County (seat: Czersk) Warsaw County (seat: Warsaw)
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