| Kosewo | |
| 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: | Mrągowo |
| Coordinates: | 53.8286°N 21.3881°W |
| Pushpin Map: | Poland |
| Pushpin Label Position: | bottom |
| Population Total: | 370 |
Kosewo is a village in the administrative district of Gmina Mrągowo, within Mrągowo County, Warmian-Masurian Voivodeship, in northern Poland.[1] It lies approximately 8km (05miles) south-east of Mrągowo and 590NaN0 east of the regional capital Olsztyn.
As a result of the Treaty of Versailles the 1920 East Prussian plebiscite was organized on 11 July 1920 under the control of the League of Nations, which resulted in 380 votes to remain in Germany and none for Poland.[2] Thus the village remained part of Germany until 1945.