Tajno Łanowe [ˈtai̯nɔ waˈnɔvɛ] is a village in the administrative district of Gmina Bargłów Kościelny, within Augustów County, Podlaskie Voivodeship, in north-eastern Poland. It lies approximately 6 kilometres (4 mi) south-east of Bargłów Kościelny, 15 km (9 mi) south-west of Augustów, and 71 km (44 mi) north of the regional capital Białystok.