Mielenko [mjɛˈlɛnkɔ] (German: Klein Möllen) is a village in the administrative district of Gmina Mielno, within Koszalin County, West Pomeranian Voivodeship, in north-western Poland. It lies approximately 14 kilometres (9 mi) north-west of Koszalin and 132 km (82 mi) north-east of the regional capital Szczecin.

Before 1637 the area was part of Duchy of Pomerania. For the history of the region, see History of Pomerania.

The village has a population of 183.