Grajewo County is a unit of territorial administration and local government (powiat) in Podlaskie Voivodeship, north-eastern Poland. 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 Grajewo, which lies north-west of the regional capital Bialystok. The county also contains the towns of Szczuczyn, lying south-west of Grajewo, and Rajgród, north-east of Grajewo.