Kupinin [kuˈpinin] is a village in the administrative district of Gmina Dąbie, within Koło County, Greater Poland Voivodeship, in west-central Poland. It lies approximately 4 kilometres (2 mi) north-east of Dąbie, 20 km (12 mi) south-east of Koło, and 137 km (85 mi) east of the regional capital Poznań.