Pernitz is a town in the district of Wiener Neustadt-Land, in the Austrian state of Lower Austria. It lies in the eastern part of the country, within the Piesting valley at the eastern edge of the Gutenstein Alps, roughly 60 kilometres south of Vienna.
The town is best known as the starting point of the Myrafälle, a narrow gorge cut by the Myrabach stream in the foothills of the Schneeberg massif. A network of footbridges and steps follows the waterfalls through the ravine, making it a popular destination for day walks from Vienna and Wiener Neustadt.
Pernitz is connected to the wider region by the Piestingtal railway line and by the B21 road, which run through the valley toward Gutenstein and the Schneeberg area.