| Name | Type | Circle | Bench | Formed | Notes |
| Calvelage | County | | | 1072 | 1170: Annexed to Ravensberg |
| Calw | County | | | | 1075: 1st mention of Calw 1155: Acquired Lowenstein 1189: Acquired Vaihingen Division into Calw-Lowenstein and Calw-Vaihingen 1277: Counts of Calw-Lowenstein died out; territories purchased by an illegitimate branch of the Habsburgs 1282: Counts of Calw died out; territories inherited by Counts of Tubingen 1361: Counts of Calw-Vaihingen died out; territories inherited by Counts of Wurttemberg |
| Cambrai | Bishopric | Low Rhen | | | |
| Cambrai | Imperial City | Burg | | | 1677: Annexed to France |
| Cappenberg | | | | | |
| Carinthia | 970: Margraviate 1180: Duchy | Aust | PR | 876; 927; 976; 995 | 1286: To Counts of Gorizia 1335: To Habsburg Austria 1512 Austrian Circle 1804: To Kingdom of Illyria |
| Carniola | 1002: Margraviate 1364: Duchy | Aust | PR | 1040 | 1054: Emperor Henry II creates a separate Carniola as a fief Duchy of Carinthia 1071-1090: To Aquileia 1237-1251: Imperial Administration 1259-1269: To Aquileia 1270-1918: To Habsburgs 1512: Austrian Circle 1803: Imperial Estate in Bench of Princes 1805-1806: French occupation |
| Castell | 1200: County | Franc | | 1200 | 1254: Partitioned into Elder and Younger lines 1347: Elder branch extinct; Castell reunited 1500: Franconian Circle 1597: Partitioned into Castell-Remlingen and Castel-Rüdenhausen |
| Castell | County | | | 1709: Partitioned from Castell-Castell | 1772: Re-annexed to Castell-Castell Composed of 3 territories and 28 villages |
| Castell-Castell | 1668: County | | | 1668: Partitioned from Castell-Remlingen | 1709: Division into Castell-Castell and Castell>br>1772: Annexed Castell 1806: Mediatised to Bavaria |
| Castell-Remlingen | 1597: County | | | 1597: Partitioned from Castell | 1668: Division ito Castlell-Remlingen and Castell-Castell 1762: Re-annexed to Castell |
| Castell-Rüdenhausen | County | | | 1597: Partitioned from Castell | |
| Castels | High Jurisdiction | | | | |
| Chablais | 1310: Duchy | | | | |
| Chatelot | Lordship | | | | |
| Chiemsee | Bishopric | | | | |
| Chur | Bishopric | Aust | EC | 1170 | 1512: Austrian Circle 1793: Council of Princes 1798: Annexed to the Helvetic Republic |
| Churwalden | Jurisdiction | | | | |
Cilli Cilly | 1341: County 1436: HRE Principality of Cilli and Ortenburg | | | | 1456: Counts of Cilli died out; estates inherited by Habsburgs |
| Cläven | Lordship | | | 909 | Partitioned in 950 |
| Clemont | Lordship | | | | |
Cleves Kleve | 1000's: County 1417: Duchy | Low Rhen | PR | 719 | 1368: United with County of Mark 1521: United with Julich, Berg, Cleves and Mark 1582: HRE Council of Princes 1609: War of Succession 1614 to Brandenburg ?-1672: Occupied by United Provinces To Prussia 1795: French occupation 1815: To Prussia |
| Colloredo | Principality (personalist) | n/a | FR | 1763 | 1788: Renamed to Colloredo-Mansfeld |
| Colloredo-Mansfeld | Principality (personalist) | n/a | FR | 1788: Renamed from Colloredo | 1803: Purchased a portion of Limpurg, and Rieneck |
| Colmar | Imperial City | Upp Rhen | | | 1648: Annexed to France |
Cologne Köln (in German) | Archbishopric 1356: HRE Prince-Elector | El Rhin | EL | 954 | 1512: Electoral Rhenish Circle 1803: Annexed to Landgraviate of Hesse-Darmstadt |
| Cologne | Free City | Low Rhen | RH | 1288 | 1794: Annexed to France |
| Comburg | Imperial Abbey | | | | |
Corvey (Korvey) | 877: Abbey c1582: Prince-Abbot 1783: Prince-Bishopric Principality | Low Rhen | | 877 | 1793: Council of Princes 1803: Secularized as a principality to Nassau-Dillenburg |
| Cottbus | Lordship | | | | 1156: 1st mention of Cottbus 1199-1445: To Lords of Cottbus 1462: To Prince-Electors of Brandenburg |
Croy Dukes of Croÿ, HRE Prince | Duchy 1767: HRE Prince | | | | 1590: non-immediate Counts of Solre in the Spanish Low Countries 1677: Prince of Solre in the Spanish Low Countries 1767 non-immediate Dukes of Croÿ in France 1803: immediate Lords of Dülmen |