Austrian army may refer to:

• Austrian Federal Army, the modern Austrian military
• Austro-Hungarian Army, the ground force of the Austro-Hungarian Dual Monarchy from 1867 to 1918
  • Common Army, the largest part of the Austro-Hungarian Army from 1867 to 1914
  • Imperial-Royal Landwehr (of Austria), 1867 to 1918
• Imperial Army of the Holy Roman Emperor, the army of the Habsburg emperors
• Imperial and Royal Army during the Napoleonic Wars, the reformed armed force of the Austrian Empire (1792–1815)
• Imperial Austrian Army (1806–1867), army of the Austrian Empire