Jasionka [jaˈɕɔnka] is a settlement in the administrative district of Gmina Kołczygłowy, within Bytów County, Pomeranian Voivodeship, in northern Poland. It lies approximately 9 kilometres (6 mi) south of Kołczygłowy, 18 km (11 mi) west of Bytów, and 94 km (58 mi) west of the regional capital Gdańsk.