Kołaczkowo [kɔwat͡ʂˈkɔvɔ] is a village in Września County, Greater Poland Voivodeship, in west-central Poland. It is the seat of the gmina (administrative district) called Gmina Kołaczkowo. It lies approximately 14 kilometres (9 mi) south of Września and 52 km (32 mi) south-east of the regional capital Poznań.

The main landmark of the village is the Reymont Palace, in which Polish novelist and Nobel Prize laureate Władysław Reymont lived from 1920 to 1925. It currently houses a museum dedicated to Reymont. Another notable historic structure is the Saint Simon and Jude Thaddeus church.