Domanin [dɔˈmanin] (German: Dommen) is a village in the administrative district of Gmina Kępno, within Kępno County, Greater Poland Voivodeship, in west-central Poland. It lies approximately 8 kilometres (5 mi) north of Kępno and 139 km (86 mi) south-east of the regional capital Poznań.
The village has a population of 300.