Salm-Horstmar
Salm-Horstmar was a short-lived Napoleonic County in far northern North Rhine-Westphalia, Germany, located around Horstmar, to the northeast of Münster. It was created in 1803 for Wild- and Rhinegrave Wilhelm Frederick Charles Augustus of Salm-Grumbach, member of an ancient German House of Salm, following the loss of Grumbach and other territories west of the Rhine to France. The county was mediatised to the Kingdom of Prussia in 1813 and the Wild- and Rhinegrave was awarded a princely title within the Kingdom of Prussia three years later, on 22 November 1816 by Frederick William III of Prussia.
Count of Salm-Horstmar (1803–1813)
- [Friedrich, 1st Prince of Salm-Horstmar|Wilheml Friedrich, 1st Prince of Salm-Horstmar|Friedrich Charles Augustus]
Princes of Salm-Horstmar (1816-present)
Friedrich, 1st Prince 1816-1865- * Prince Karl of Salm-Horstmar, who ceded the rights of primogeniture to his younger brother Otto on 27 March 1865.
- * Otto I, 2nd Prince 1865-1892
- ** Otto II, 3rd Prince 1892-1941
- *** Philipp Franz, 4th Prince 1941-1996
- **** Philipp Otto, 5th Fürst 1996–2025
- ***** Philipp, Fürst of Salm-Horstmar 2025- heute
- ***** Prince Christian of Salm-Horstmar
- **** Prince Gustav Friedrich of Salm-Horstmar
- ***** Prince Maximilian of Salm-Horstmar
- ***** Prince Leopold of Salm-Horstmar
- **** Prince Johann Christof of Salm-Horstmar
- **** Prince Carlos Federico of Salm-Horstmar
- ***** Prince Constantin of Salm-Horstmar
- ***** Prince Adrian of Salm-Horstmar