Buśnia is a village in the administrative district of Gmina Warlubie, within Świecie County, Kuyavian-Pomeranian Voivodeship, in north-central Poland. It is located within the ethnocultural region of Kociewie in the historic region of Pomerania.

The climate is hemiboreal. The average temperature is 7 °C. The warmest month is July, at 20 °C, and the coldest is January, at −7 °C.

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