Ćmachowo [t͡ɕmaˈxɔvɔ] is a village in the administrative district of Gmina Wronki, within Szamotuły County, Greater Poland Voivodeship, in west-central Poland. It lies approximately 5 kilometres (3 mi) south-west of Wronki, 21 km (13 mi) north-west of Szamotuły, and 52 km (32 mi) north-west of the regional capital Poznań.