Zajki [ˈzai̯ki] is a village in the administrative district of Gmina Trzcianne, within Mońki County, Podlaskie Voivodeship, in north-eastern Poland. It lies approximately 14 kilometres (9 mi) south of Trzcianne, 24 km (15 mi) south-west of Mońki, and 39 km (24 mi) west of the regional capital Białystok.