Jegliniec ([jɛˈɡliɲɛt͡s]; Lithuanian: Eglinė[3]) is a village in the administrative district of Gmina Krasnopol, within Sejny County, Podlaskie Voivodeship, in north-eastern Poland.

[5] The noblee village in the Grodno region was located at the end of the 18th century in the Grodno district of the Trakai Voivodeship of the Grand Duchy of Lithuania.

[7] According to the First General Population Census of 1921, the village of Jegliniec had 8 houses and 66 inhabitants.

At that time, all inhabitants of the village declared Roman Catholicism.

At the same time, the majority of the village inhabitants, 43 people, declared Lithuanian nationality, and the remaining 23 persons declared Polish nationality.