Semmering is a town in the district of Neunkirchen in the Austrian state of Lower Austria. It is noted for its skiing, and has hosted the Alpine skii…Semmering is a town in the district of Neunkirchen in the Austrian state of Lower Austria. It is noted for its skiing, and has hosted the Alpine skiing World Cup several times. When the Semmering Railway was completed in 1854, the town quickly became a popular tourist getaway in winter months. In 2011, the town had a permanent population of 571.