Isenburg-Birstein was the name of two German historical states centred on Birstein in southeastern Hesse, Germany.
History The first "Isenburg-Birstein" was a County and was created as a partition of Isenburg-Büdingen-Birstein in 1628. It was merged into Isenburg-Offenbach in 1664.
The second "Isenburg-Birstein" was a County (later Principality), created as a partition of Isenburg-Offenbach in 1711 and elevated to Principality in 1744. It was renamed the "Principality of Isenburg" in 1806 when Isenburg-Birstein joined the Confederation of the Rhine and was granted the mediatized Isenburgian Countships of Isenburg-Büdingen, Isenburg-Meerholz, Isenburg-Philippseich, and Isenburg-Wächtersbach.
Counts of Isenburg-Birstein (1628–1664)
William Otto (1628–1635) Christian Maurice (1635–1664) with... Wolfgang Ernest II (1635–1641) with... John Louis (Count of Isenburg-Offenbach) (1641–1664) To Isenburg-Offenbach.
Count of Isenburg-Birstein (1711–1744) Wolfgang Ernest I (1711–1754)
Princes of Isenburg-Birstein (1744–1806) Wolfgang Ernst I of Isenburg-Birstein (1711–1754) Wolfgang Ernst II of Isenburg-Birstein (1754–1803) Charles (Prince of Isenburg) (1803–1806) Renamed to Isenburg.
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