Kamionka [kaˈmjɔnka] is a village in the administrative district of Gmina Witkowo, within Gniezno County, Greater Poland Voivodeship, in west-central Poland. It lies approximately 5 kilometres (3 mi) north-east of Witkowo, 17 km (11 mi) south-east of Gniezno, and 62 km (39 mi) east of the regional capital Poznań.