Okiersk is a village in the administrative district of Gmina Cekcyn, within Tuchola County, Kuyavian-Pomeranian Voivodeship, in north-central Poland. It lies approximately 6 km north of Cekcyn, 10 km east of Tuchola, and 57 km north of Bydgoszcz. It is located in the Tuchola Forest in the historic region of Pomerania. Okiersk was a royal village of the Polish Crown, administratively located in the Tuchola County in the Pomeranian Voivodeship.