Ruszajny [ruˈʂai̯nɨ] is a village in the administrative district of Gmina Barczewo, within Olsztyn County, Warmian-Masurian Voivodeship, in northern Poland.

Ruszajny is approximately 3 kilometres (2 mi) north-east of Barczewo and 17 km (11 mi) north-east of the regional capital Olsztyn.