Sędzin [ˈsɛnd͡ʑin] is a village in the administrative district of Gmina Zakrzewo, within Aleksandrów County, Kuyavian-Pomeranian Voivodeship, in north-central Poland.

The area formed part of Poland since the establishment of the state in the 10th century.

[2] In 1750, the chapter of the Diocese of Płock funded the construction of the wooded church of St. Matthew in the village.

[3] In 1940, the occupiers also carried out expulsions of Poles, whose houses were then handed over to German colonists as part of the Lebensraum policy.

[4] Expelled Poles were either deported to the General Government in the more eastern part of German-occupied Poland or enslaved as forced labour of new German colonists in the county.