Konstantynówka [kɔnstantɨˈnufka], 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.

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