Plesno may refer to the following places:
- Pleśno, Lubusz Voivodeship (west Poland)
- Pleśno, Bartoszyce County in Warmian-Masurian Voivodeship (north Poland)
- Pleśno, Ostróda County in Warmian-Masurian Voivodeship (north Poland)
- Płęsno, Pomeranian Voivodeship (north Poland)
Płęsno is a settlement in the administrative district of Gmina Chojnice, within Chojnice County, Pomeranian Voivodeship, in northern Poland. It lies approximately north of Chojnice and south-west of the regional capital Gdańsk.
For details of the history of the region, see History of Pomerania.
The settlement has a population of 36.