Dziaduszyn [d͡ʑaˈduʂɨn] (German: Charlottenhof) is a settlement in the administrative district of Gmina Pozezdrze, within Węgorzewo County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 5 kilometres (3 mi) north-west of Pozezdrze, 7 km (4 mi) south-east of Węgorzewo, and 96 km (60 mi) north-east of the regional capital Olsztyn.

The settlement has a population of 20.