Karnkowo is a village in the administrative district of Gmina Lipno, within Lipno County, Kuyavian-Pomeranian Voivodeship, in north-central Poland. It is located in the historic Dobrzyà  Land.
During the German occupation of Poland (World War II), the forest of Karnkowo was the site of large massacres, in which Germans murdered around 200 Poles, inhabitants of Karnkowo, as well as nearby towns of Lipno and SkÃÂpe and other nearby villages. Local teacher Wà Âadysà Âaw Karczewski was among Polish teachers murdered in the Mauthausen concentration camp during the Intelligenzaktion.