Grodzisk [ˈɡrɔd͡ʑisk] is a village in Siemiatycze County, Podlaskie Voivodeship, in north-eastern Poland. It is the seat of the gmina (administrative district) called Gmina Grodzisk. It lies approximately 20 kilometres (12 mi) north-west of Siemiatycze and 66 km (41 mi) south-west of the regional capital Białystok.