Poškonys [poʃ'koːnʲiːs] is a village in Vilnius County, 14 kilometres (8.7 mi) southeast of Šalčininkai, Lithuania, in the so-called Dieveniškės appendix.

While the inhabitants of Dieveniškės appendix are mostly[dubious – discuss] Polish by ethnicity, Poškonys from the old days had a Lithuanian majority.

The village itself belongs to ethno-cultural reserve and has an architectural monument status.

There's a museum full of traditional Lithuanian craft, various household items, and a protected stone at the crossroad of Lastaučikai village [lt].

The 2011 census recorded a population of 129 living in Poškonys.