Klejniki [klɛi̯ˈɲikʲi] is a village in the administrative district of Gmina Czyże, within Hajnówka County, Podlaskie Voivodeship, in north-eastern Poland.

[1] It lies approximately 8 kilometres (5 mi) north of Czyże, 18 km (11 mi) north-west of Hajnówka, and 34 km (21 mi) south-east of the regional capital Białystok.

According to the 1921 census, the village was inhabited by 636 people, among whom 4 were Roman Catholic, 628 Orthodox, and 4 Mosaic.

At the same time, 4 inhabitants declared Polish nationality, and 632 Belarusian.

This Hajnówka County location article is a stub.