The Rosalia Mountains, sometimes called the Rosalie Mountains or Rosalien Mountains, are an outlier of the Alps on the state border between Lower Austria and Burgenland in Austria. The low mountain range runs from north to south and reaches its highest point at the summit of the Heuberg near Neudörfl, before descending again towards the village of Weppersdorf. They are separated from the Leitha Mountains to the north by the Ödenburg Gate.