Electoral Rhenish Circle
The Electoral Rhenish Circle was an Imperial Circle of the Holy Roman Empire, created in 1512.
The circle derived its name from four of the seven prince-electors whose lands along the Middle Rhine comprised the vast majority of its territory.
Composition
The circle was made up of the following states:| Name | Type of entity | Comments |
| Arenberg | County | Attained imperial immediacy in 1549 under Jean de Ligne, Principality from 1576, raised to Duchy in 1644 |
| Beilstein | Lordship | Held by the Counts of Nassau-Dillenburg from 1343 |
| Cologne | Prince-bishopric | established by King Otto I in 953, Prince-elector and Archchancellor of Italy in 1356; including Vest Recklinghausen and the Duchy of Westphalia |
| Koblenz | Bailiwick | An administrative grouping of lands including the immediate Lordship of Elsen, held by the Teutonic Knights |
| Mainz | Prince-bishopric | Archbishopric established in 781 by Pope Adrian I, Prince-elector and Archchancellor of Germany in 1356; including Eichsfeld, Erfurt, and Aschaffenburg |
| Nieder-Isenburg | County | Emerged from Isenburg-Isenburg in 1199, partitioned in 1502 into Isenburg-Grenzau and Isenburg-Neumagen, extinct in 1664 |
| Electorate of the Palatinate | County palatinate | Arose from the allodium of the Count palatine of Lower Lorraine in 1085 under Henry of Laach, held by the House of Wittelsbach from 1214, Prince-elector and Truchsess in 1356 |
| Rheineck | Burgraviate | Fiefdom of Cologne around :de:Burg Rheineck|Burg Rheineck, held by the Freiherren of Varsberg from 1576 |
| Thurn und Taxis | Barons | Briefadel without territory, Freiherren from 1608, Counts from 1624, raised to Princely Counts in 1695 |
| Trier | Prince-bishopric | Established in 902, Prince-elector and Archchancellor of Arles in 1356 |