Kozielsko [kɔˈʑɛlskɔ] is a village in the administrative district of Gmina Damasławek, within Wągrowiec County, Greater Poland Voivodeship, in west-central Poland. It lies approximately 7 kilometres (4 mi) west of Damasławek, 15 km (9 mi) east of Wągrowiec, and 58 km (36 mi) north-east of the regional capital Poznań.