Olszewo [ɔlˈʂɛvɔ] is a village in the administrative district of Gmina Olecko, within Olecko County, Warmian-Masurian Voivodeship, in northern Poland.

It lies approximately 9 kilometres (6 mi) north-west of Olecko and 129 km (80 mi) east of the regional capital Olsztyn.