Machnacz [ˈmaxnat͡ʂ] is a village in the administrative district of Gmina Brześć Kujawski, within Włocławek County, Kuyavian-Pomeranian Voivodeship, in north-central Poland. It lies approximately 6 kilometres (4 mi) north-east of Brześć Kujawski, 7 km (4 mi) west of Włocławek, and 49 km (30 mi) south-east of Toruń.