The 9th Mounted Rifles were a light cavalry regiment of the Royal Prussian Army. The regiment was formed 1 October 1913 in Insterburg.

• List of Imperial German cavalry regiments

• Schulz, Hugo (1992). Die preussischen Kavallerie-Regimenter 1913/1914 nach dem Gesetz vom 3. Juli 1913. Augsburg: Weltbild. p. 184. ISBN 3893503439.