Administrative Structure of the Parishes of the Ostrołęka Powiat

The followng parishes were part of the Ostrołęka Powiat at the beginning of the 20th Century: Czerwin, Goworowo, Kadzidło, Kleczkowo, Kunin, Myszyniec, Ostrołęka, Piski, Rzekuń, and Troszyn.

The administrative structure of the parishes of Czerwin, Goworowo, Kadzidło, Kunin (established 01 Jan 1937), Myszyniec, Ostrołęka, Troszyn can be described as follows:

• 01 Jul 1569-03 Oct 1795:  Village, Łomża Ziemia, Masovian Voivodeship, Province of Greater Poland, Polish-Lithuanian Commonwealth
• 04 Oct 1795-13 Oct 1809:  Village, Kammerdepartement Płock, Province of New East Prussia, Kingdom of Prussia
• 14 Oct 1809-09 Jun 1815:  Village, Ostrołęka Powiat, Płock Department, Duchy of Warsaw
• 09 Jun 1815-15 Jan 1816: Village, Ostrołęka Powiat, Płock Department, Congress Kingdom of Poland
• 16 Jan 1816-06 Mar 1837: Village, Ostrołęka Obwód, Płock Voivodeship, Congress Kingdom of Poland
• 07 Mar 1837-10 Oct 1842: Village, Ostrołęka Obwód, Płock Gubernia, Congress Kingdom of Poland
• 11 Oct 1842-30 Dec 1866: Village, Ostrołęka Powiat, Płock Gubernia, Congress Kingdom of Poland
• 31 Dec 1866-17 Oct 1915:  Village, Ostrołęka Powiat, Łomża Gubernia, Congress Kingdom of Poland
• 18 Oct 1915-10 Nov 1918: Village, Ostrołęka Powiat, General Government of Warsaw, German Empire
• 11 Nov 1918-31 Mar 1939:  Village, Ostrołęka Powiat, Białystok Voivodeship, Second Polish Republic
• 01 Apr 1939-31 Aug 1939: Village, Ostrołęka Powiat, Warsaw Voivodeship, Second Polish Republic
• 01 Sep 1939-27 Jun 1945:  Village, Regierungsbezirk Zichenau, Province of East Prussia, German Reich
• 28 Jun 1945-21 Jul 1952:  Village, Ostrołęka Powiat, Warsaw Voivodeship, Republic of Poland
• 22 Jul 1952-31 May 1975:  Village, Ostrołęka Powiat, Warsaw Voivodeship, Polish People’s Republic
• 01 Jun 1975-30 Dec 1989:  Village, Ostrołęka Voivodeship, Polish People’s Republic
• 31 Dec 1989-30 Dec 1998:  Village, Ostrołęka Voivodeship, Third Polish Republic
• 31 Dec 1998-Present:  Village, Ostrołęka Powiat, Masovian Voivodeship, Third Polish Republic

The administrative structure of the parishes of Kleczkowo, Piski, and Rzekuń can be described as follows:

• 01 Jul 1569-03 Oct 1795:  Village, Łomża Ziemia, Masovian Voivodeship, Province of Greater Poland, Polish-Lithuanian Commonwealth
• 04 Oct 1795-13 Oct 1809:  Village, Kammerdepartement Płock, Province of New East Prussia, Kingdom of Prussia
• 14 Oct 1809-09 Jun 1815:  Village, Ostrołęka Powiat, Płock Department, Duchy of Warsaw
• 09 Jun 1815-15 Jan 1816: Village, Ostrołęka Powiat, Płock Department, Congress Kingdom of Poland
• 16 Jan 1816-06 Mar 1837: Village, Ostrołęka Obwód, Płock Voivodeship, Congress Kingdom of Poland
• 07 Mar 1837-10 Oct 1842: Village, Ostrołęka Obwód, Płock Gubernia, Congress Kingdom of Poland
• 11 Oct 1842-30 Dec 1866: Village, Ostrołęka Powiat, Płock Gubernia, Congress Kingdom of Poland
• 31 Dec 1866-17 Oct 1915:  Village, Ostrołęka Powiat, Łomża Gubernia, Congress Kingdom of Poland
• 18 Oct 1915-10 Nov 1918: Village, Ostrołęka Powiat, General Government of Warsaw, German Empire
• 11 Nov 1918-31 Mar 1939:  Village, Ostrołęka Powiat, Białystok Voivodeship, Second Polish Republic
• 01 Apr 1939-31 Aug 1939: Village, Ostrołęka Powiat, Warsaw Voivodeship, Second Polish Republic
• 01 Sep 1939-21 Jun 1941:  Village, Byelorussian Soviet Socialist Republic, USSR
• 22 Jun 1941-27 Jun 1945: Village, Regierungsbezirk Zichenau, Province of East Prussia, German Reich
• 28 Jun 1945-21 Jul 1952:  Village, Ostrołęka Powiat, Białystok Voivodeship, Republic of Poland
• 22 Jul 1952-31 May 1975:  Village, Ostrołęka Powiat, Warsaw Voivodeship, Polish People’s Republic
• 01 Jun 1975-30 Dec 1989:  Village, Ostrołęka Voivodeship, Polish People’s Republic
• 31 Dec 1989-30 Dec 1998:  Village, Ostrołęka Voivodeship, Third Polish Republic
• 31 Dec 1998-Present:  Village, Ostrołęka Powiat, Masovian Voivodeship, Third Polish Republic

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