Maćkowicze [mat͡ɕkɔˈvʲit͡ʂɛ] is a village in the administrative district of Gmina Mielnik, within Siemiatycze County, Podlaskie Voivodeship, in north-eastern Poland, close to the border with Belarus. It lies approximately 13 kilometres (8 mi) north-west of Mielnik, 4 km (2 mi) south-east of Siemiatycze, and 80 km (50 mi) south of the regional capital Białystok.