Anusin [aˈnuɕin] (Belarusian: Анусін, Podlachian: Anúsin) is a village in the administrative district of Gmina Siemiatycze, within Siemiatycze County, Podlaskie Voivodeship, in north-eastern Poland. It lies approximately 6 kilometres (4 mi) south-east of Siemiatycze and 83 km (52 mi) south of the regional capital Białystok.