| Konstantynówka | |
| Settlement Type: | Village |
| Total Type: | |
| Subdivision Type: | Country |
| Subdivision Type1: | Voivodeship |
| Subdivision Name1: | Podlaskie |
| Subdivision Type2: | County |
| Subdivision Name2: | Sejny |
| Subdivision Type3: | Gmina |
| Subdivision Name3: | Giby |
| Coordinates: | 54.0686°N 23.3472°W |
| Pushpin Map: | Poland |
| Population As Of: | 2021 |
| Population Total: | 21 [1] |
| Postal Code Type: | Postal code |
| Postal Code: | 16-506 [2] |
| Blank Name: | Car plates |
| Blank Info: | BSE |
| Code1 Name: | SIMC |
| Code1 Info: | 0757571[3] |
Konstantynówka, is a village in the administrative district of Gmina Giby, within Sejny County, Podlaskie Voivodeship, in north-eastern Poland, close to the borders with Belarus and Lithuania.[4] It lies off national road 16.
In 1921 the village had 9 houses and 50 inhabitants, including 19 Catholics, 16 Old Believers and 15 Orthodox Christians.[5]