Trojaczek [trɔˈjat͡ʂɛk] is a village in the administrative district of Gmina Piotrków Kujawski, within Radziejów County, Kuyavian-Pomeranian Voivodeship, in north-central Poland. It lies approximately 7 kilometres (4 mi) south-east of Piotrków Kujawski, 14 km (9 mi) south of Radziejów, and 58 km (36 mi) south of Toruń.