Szałstry [ˈʂau̯strɨ] is a village in the administrative district of Gmina Jonkowo, within Olsztyn County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 9 kilometres (6 mi) west of Jonkowo and 22 km (14 mi) west of the regional capital Olsztyn.

Before 1772 the area was part of Kingdom of Poland, and in 1772–1945 it belonged to Prussia and Germany (East Prussia).