Hajnówka County (Polish: powiat hajnowski) is a unit of territorial administration and local government (powiat) in Podlaskie Voivodeship, north-eastern Poland, on the border with Belarus. It came into being on January 1, 1999, as a result of the Polish local government reforms passed in 1998. Its administrative seat and largest town is Hajnówka, which lies 51 kilometres (32 mi) south-east of the regional capital Białystok. The only other town in the county is Kleszczele, lying 25 km (16 mi) south-west of Hajnówka.