Łączyn [ˈwɔnt͡ʂɨn] is a village in the administrative district of Gmina Zakrzewo, within Złotów County, Greater Poland Voivodeship, in west-central Poland. It lies approximately 4 kilometres (2 mi) south-west of Zakrzewo, 7 km (4 mi) north-east of Złotów, and 112 km (70 mi) north of the regional capital Poznań.

For more on its history, see Złotów County.