Nová Polianka (Rusyn: Нова Полянка; Hungarian: Mérgesvágása, until 1899: Mergeska) is a village and municipality in Svidník District in the Prešov Region of north-eastern Slovakia.

In historical records the village was first mentioned in 1414.

The municipality lies at an altitude of 337 metres and covers an area of 5.471 km2.

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