Sidra, Sokółka County
Sidra is a village in Sokółka County, Podlaskie Voivodeship, in north-eastern Poland. It is the seat of the gmina (administrative district) called Gmina Sidra. It lies approximately north of Sokółka and north of the regional capital Białystok. The village has a population of 730. A Jewish population of 455 existed in 1921. The wooden synagogue built at the turn of the 17th & 18th centuries was burned down by the Germans in 1942.