Olszewo is a village in the administrative district of Gmina Olecko, within Olecko County, Warmian-Masurian Voivodeship, in northern Poland.
It is located in Masuria.
The village was founded in 1563 by Mikoà Âaj Lipià Âski. It was historically known in Polish as Olszewo and Lipià Âskie.
As of 1870, it was inhabited by 513 Poles and 123 Germans.