Smolarnia [smɔˈlarɲa] is a village in the administrative district of Gmina Trzcianka, within Czarnków-Trzcianka County, Greater Poland Voivodeship, in west-central Poland. It lies approximately 7 kilometres (4 mi) west of Trzcianka, 20 km (12 mi) north-west of Czarnków, and 80 km (50 mi) north-west of the regional capital Poznań.

The village has an approximate population of 130.