Salm-Kyrburg was a state of the Holy Roman Empire located in present-day Rhineland-Palatinate, Germany, one of the various partitions of Salm. It was twice created: the first time as a Wild- and Rhinegraviate (partitioned from Upper Salm), and secondly as a Principality (succeeding the earlier Principality of Salm-Leuze). The first state of Salm-Kyrburg was partitioned between itself, Salm-Mörchingen and Salm-Tronecken in 1607, and was inherited by Salm-Neuweiler in 1681 upon the lines' extinction.
In 1742, Salm-Kyrburg was raised to a principality; it shared its vote in the Reichstag with Salm-Salm. Salm-Kyrburg was annexed by France in 1798; this was recognized by the Holy Roman Empire in the Treaty of Lunéville of 1801. As a compensation, the princes were granted new territories formerly belonging to the Bishops of Münster in 1802, which formed the newly founded Principality of Salm.