Tejstymy [tɛi̯sˈtɨmɨ] is a village in the administrative district of Gmina Kolno, within Olsztyn County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 9 kilometres (6 mi) south-west of Kolno and 32 km (20 mi) north-east 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).