| Olszewo | |
| Settlement Type: | Village |
| Total Type: | |
| Subdivision Type: | Country |
| Subdivision Type1: | Voivodeship |
| Subdivision Name1: | Warmian-Masurian |
| Subdivision Type2: | County |
| Subdivision Name2: | Mrągowo |
| Subdivision Type3: | Gmina |
| Subdivision Name3: | Mikołajki |
| Coordinates: | 53.8606°N 21.6767°W |
| Pushpin Map: | Poland |
| Pushpin Label Position: | bottom |
| Population Total: | 440 |
Olszewo is a village in the administrative district of Gmina Mikołajki, within Mrągowo County, Warmian-Masurian Voivodeship, in northern Poland.[1] It lies approximately 10km (10miles) north-east of Mikołajki, 250NaN0 east of Mrągowo, and 780NaN0 east of the regional capital Olsztyn.