| Olszewo | |
| Settlement Type: | Village |
| Total Type: | |
| Coordinates: | 53.6986°N 22.2383°W |
| Pushpin Map: | Poland |
| Subdivision Type: | Country |
| Subdivision Type1: | Voivodeship |
| Subdivision Name1: | Warmian-Masurian |
| Subdivision Type2: | County |
| Subdivision Name2: | Ełk |
| Subdivision Type3: | Gmina |
| Subdivision Name3: | Prostki |
Olszewo is a village in the administrative district of Gmina Prostki, within Ełk County, Warmian-Masurian Voivodeship, in northern Poland.[1]