Nieder-Isenburg (often called Lower Isenburg) was a small mediaeval County in northern

Rhineland-Palatinate Rhineland-Palatinate ( , ; german: link=no, Rheinland-Pfalz ; lb, Rheinland-Pfalz ; pfl, Rhoilond-Palz) is a western state of Germany. It covers and has about 4.05 million residents. It is the ninth largest and sixth most populous of the ...

Germany Germany,, officially the Federal Republic of Germany, is a country in Central Europe. It is the second most populous country in Europe after Russia, and the most populous member state of the European Union. Germany is situated betwe ...

. It was located to the east of the town of

Neuwied Neuwied () is a town in the north of the German state of Rhineland-Palatinate, capital of the District of Neuwied. Neuwied lies on the east bank of the Rhine, 12 km northwest of Koblenz, on the railway from Frankfurt am Main to Cologne. Th ...

, due north of Vallendar. Roughly speaking, territories of the Archbishops of

Trier Trier ( , ; lb, Tréier ), formerly known in English as Trèves ( ;) and Triers (see also names in other languages), is a city on the banks of the Moselle in Germany. It lies in a valley between low vine-covered hills of red sandstone in the ...

were located to the south, and territories of the Counts of Wied to the north. Nieder-Isenburg emerged in 1218 as a partition of the County of

Isenburg-Isenburg Isenburg-Isenburg was the name of a state of the Holy Roman Empire, based around Isenburg in modern Rhineland-Palatinate, Germany Germany,, officially the Federal Republic of Germany, is a country in Central Europe. It is the secon ...

. Nieder-Isenburg was partitioned twice: between

Isenburg-Grenzau Isenburg-Grenzau was the name of several states of the Holy Roman Empire, seated in the Lordship of Grenzau, in modern Rhineland-Palatinate, Germany. The first state called Isenburg-Grenzau existed 1158–1290; the second 1341–1439; and the third ...

, Isenburg-Neumagen and itself in 1502, and between Isenburg-Grenzau and Isenburg-Neumagen in 1503. Following the death of Count Ernst of Isenburg in Brussels in 1664 without direct heir, the territories of Nieder-Isenburg were claimed back as a feudal tenure by the Archbishopric of Cologne, the Archbishopric of Trier and the core tenure of Isenburg and Grenzau by the Archbishopric of Fulda. The Fulda part was eventually passed on to the Counts of Walderdorff who had to share them with the Counts of Wied, at that stage a cadet branch of the Isenburgs, following a later agreement. Eventually the Walderdorff estates were distributed to the Nassovian state in the

Napoleonic Napoleon Bonaparte ; it, Napoleone Bonaparte, ; co, Napulione Buonaparte. (born Napoleone Buonaparte; 15 August 1769 – 5 May 1821), later known by his regnal name Napoleon I, was a French military commander and political leader wh ...

era.

Counts of Nieder-Isenburg (1218–1664)

* Theodoric I (1218–53) * Theodoric II (1253–73) * Salentin I (1273–1300) * Salentin II (1300–34) ''with...'' * Salentin III (1319–70) * Salentin IV (1370–1420) * Salentin V (1420–58) * Gerlach I (1458–90) * Gerlach II (1488–1502) ''with...'' * James (1486–1503) * Heinrich, 5.1.1521/22-1553 * Johann Heinrich, +aft 15.11.1565; * Arnold, died 1577 * Anton, +Walhain 5.11.1548–1577 * Salentin VIII (1532–1610) * Salentin IX (1580–1619) ( 5.12.1619, Prague) * Ernst (1584–1664) ''reversion to Fulda, Cologne, and Trier.'' States and territories established in 1218 Counties of the Holy Roman Empire 1210s establishments in the Holy Roman Empire 1218 establishments in Europe 1664 disestablishments in the Holy Roman Empire House of Isenburg Electoral Rhenish Circle {{Germany-hist-stub