| Olszewo | |
| Settlement Type: | Village |
| Total Type: | |
| Coordinates: | 52.5747°N 22.6492°W |
| Pushpin Map: | Poland |
| Subdivision Type: | Country |
| Subdivision Type1: | Voivodeship |
| Subdivision Name1: | Podlaskie |
| Subdivision Type2: | County |
| Subdivision Name2: | Siemiatycze |
| Subdivision Type3: | Gmina |
| Subdivision Name3: | Perlejewo |
Olszewo is a village in the administrative district of Gmina Perlejewo, within Siemiatycze County, Podlaskie Voivodeship, in north-eastern Poland.[1]