Janiszewo is a village in the administrative district of Gmina Pelplin, within Tczew County, Pomeranian Voivodeship, in northern Poland. It is located within the ethnocultural region of Kociewie in the historic region of Pomerania.
Janiszewo was a royal village of the Kingdom of Poland, administratively located in the Tczew County in the Pomeranian Voivodeship.