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Isenburg-Birstein was the name of two German historical states based around Birstein in southeastern Hesse, Germany. 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 Principality, created as a partition of Isenburg-Offenbach in 1711. It was renamed the "Principality of Isenburg" in 1806.
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)
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.