This is a list of states in the Holy Roman Empire beginning with the letter Z:
| Name | Type | Imperial circle | Imperial diet | History |
|---|---|---|---|---|
 Zähringen
|
Duchy | n/a | n/a | 962: First mentioned; Gau Counts in the Breisgau 1092: Claimed the Duchy of Swabia 1098: Renounced Swabia; assumed the title Duke of Zähringen 1112: Side line Baden founded 1152: Partitioned into itself and Teck 1218: Extinct; dispersed between numerous families and free cities |
 Zeeland
|
County | Burg | n/a | 1012: Given to Flanders 1167: West Zeeland in condomonium between Flanders and Holland 1256: West Zeeland to Holland 1303: West Zeeland to Hainaut; rest to Namur 1323: All to Hainaut 1432: To Burgundy 1477: To the Burgundian Netherlands 1556: To the Spanish Netherlands 1581: Joined the Netherlands 1648: Left the Empire as part of the Netherlands |
 Zell am Harmersbach
|
Imperial City | Swab | SW | 1139: First mentioned; to Zähringen 1218: To Swabia 1256: To Hohengeroldseck and Strasbourg 1333: To Baden 14th Century: Free Imperial City 1718: Harmersbach made Free Imperial Valley 1803: To Baden |
 Ziegenhain
|
County | n/a | n/a | 1148: First mentioned 1258: Partitioned into itself and Nidda 1333: Acquired Nidda 1450: Extinct; succession dispute between Hesse and Hohenlohe-Weikersheim. Ziegenhain was occupied by Hesse despite the legal succession of Hohenlohe 1495: Confirmed to Hesse with compensation paid to Hohenlohe-Weikersheim |
 Zimmern
|
Lordship 1538: County |
Swab | SC | 1080: First mentioned 1354: Acquired Meßkirch 1415: Acquired Wildenstein 1445: Partitioned into itself and Zimmern-Herrenzimmern 1462: Acquired Oberndorf 1488: To Werdenberg-Sigmaringen 1503: Restored 1508: Partitioned into Zimmern-Meßkirch and Zimmern-Wildenstein 1575: Reunited by Zimmern-Meßkirch 1594: Extinct; Oberndorf to Austria, Wald to Rottweil, rest to Helfenstein-Gundelfingen |
| Zimmern-Herrenzimmern
|
Lordship 1538: County |
Swab | SC | 1445: Partitioned from Zimmern 1512: To William Werner of Zimmern 1538: HRE Count 1575: Extinct; to Zimmern-Meßkirch |
| Zimmern-Meßkirch
|
Lordship 1538: County |
Swab | SC | 1508: Partitioned from Zimmern 1538: HRE Count 1575: Renamed to Zimmern |
| Zimmern-Wildenstein
|
Lordship 1538: County |
Swab | SC | 1508: Partitioned from Zimmern; originally at Oberndorf 1514: Acquired sole rule of Wildenstein 1538: HRE Count 1554: Extinct; to Zimmern-Meßkirch |
 Zollern
|
Lordship 1111: County |
n/a | n/a | 1061: First mentioned 1111: HRE Count c. 1144: Partitioned into itself and Hohenberg 1192: Acquired Nuremberg 1218: Partitioned into itself and Nuremberg 1262: Acquired Schalksburg 1288: Partitioned into Hohenzollern and Zollern-Schalksburg |
| Zollern-Schalksburg
|
County | n/a | n/a | 1288: Partitioned from Zollern 1403: Sold to Württemberg 1408: Extinct |
 Zug
|
Imperial Valley | n/a | n/a | 1264: All to Habsburg 1352: Joined the Swiss Confederation 1415: Free Imperial Valley 1648: Left the Empire as part of Switzerland |
 Zürich
|
Imperial City | n/a | n/a | 853: To Fraumünster Abbey 1063: Under advocacy of Lenzburg 1173: Under advocacy of Zähringen 1218: Free Imperial City 1351: Joined the Swiss Confederation 1440: Expelled from the Swiss Confederacy 1450: Re-admitted 1648: Left the Empire as part of Switzerland |
 Zutphen
|
County | Burg | n/a | Lordship 1101: County 1025: Mentioned; fief of Lower Lotharingia 1046: Made fief of the Bishopric of Utrecht 1101: HRE Count 1118: Extinct in male line 1138: To Guelders 1371: To Jülich-Guelders 1423: To Guelders 1538: To Jülich-Cleves-Berg 1543: To the Spanish Netherlands 1579: Joined the Netherlands 1648: Left the Empire as part of the Netherlands |
 Zweibrücken
|
County | n/a | n/a | c. 1182: Partitioned from Saarbrücken 1263: Side line Zweibrücken-Eberstein created 1286: Partitioned into Zweibrücken-Zweibrücken and Zweibrücken-Bitsch |
| Zweibrücken-Bitsch
|
County | n/a | n/a | 1286: Partitioned from Zweibrücken; originally at Lemberg 1297: Acquired Bitsch 1485: Side line Zweibrücken-Bitsch-Ochsenstein established 1559: Acquired Ochsenstein 1570: Extinct; to Hanau-Lichtenberg in succession dispute with Leiningen-Westerburg-Leiningen 1572: To Lorraine 1573: Leiningen claim sold to Lorraine 1604: Lemberg given to Hanau-Lichtenberg |
| Zweibrücken-Bitsch-Ochsenstein
|
County | n/a | n/a | 1485: Created when Henry I of Zweibrücken-Bitsch acquired Ochsenstein by marriage 1559: Extinct; to Zweibrücken-Bitsch |
| Zweibrücken-Eberstein
|
County | n/a | n/a | 1263: Created when Simon I of Zweibrücken acquired half of Eberstein Elder Line 1314: Extinct; to the Bishopric of Speyer |
| Zweibrücken-Zweibrücken
|
County | n/a | n/a | 1286: Partitioned from Zweibrücken 1385: Zweibrücken sold to the Palatinate 1394: Extinct; remaining territory to Zweibrücken-Bitsch |
 Zwiefalten
|
Abbacy | Swab | SP | 1089: Abbey established; to Achalm 1098: To Urach 1250: To Fürstenberg 1265: To Württemberg 1750: Imperial immediacy; joined the Swabian Prelates 1802: To Württemberg; secularised and suppressed |