| Conventional Long Name: | Principality of Anhalt-Zerbst |
| Common Name: | Anhalt-Zerbst |
| Symbol Type Article: | Coat of arms of Saxony-Anhalt |
| Image Map Caption: | Anhalt principalities (1747-1793), Zerbst in orange |
| Era: | Middle Ages |
| Status: | Vassal |
| Empire: | Holy Roman Empire |
| Government Type: | Principality |
| Year Start: | 1252 |
| Year End: | 1796 |
| Life Span: | 1252–1396 1544–1796 |
| Event Start: | Partitioned from Anhalt |
| Event1: | Partitioned into and |
| Date Event1: | 1396 |
| Event2: | Partitioned from |
| Date Event2: | 1544 |
| Event3: | Partitioned |
| Date Event3: | 1603 |
| Event4: | Partitioned |
| Date Event4: | 1667 |
| Event End: | Divided by, and |
| Event Post: | Duchy of Anhalt reunited |
| Date Post: | 1863 |
| P1: | Principality of Anhalt |
| S1: | Anhalt-Dessau |
| Flag S1: | Flag green white 5x3.svg |
| S2: | Anhalt-Köthen |
| Flag S2: | Flag green white 5x3.svg |
| S3: | Anhalt-Bernburg |
| Capital: | Zerbst |
| Common Languages: | Upper Saxon |
| Footnotes: | 1: In 1603, Anhalt-Zerbst lost territory to Anhalt-Dessau, Anhalt-Bernburg, Anhalt-Plötzkau and Anhalt-Köthen. 2: In 1667, Anhalt-Zerbst lost territory to create Anhalt-Mühlingen and Anhalt-Dornburg. |
Anhalt-Zerbst was a principality of the Holy Roman Empire ruled by the House of Ascania, with its residence at Zerbst in present-day Saxony-Anhalt. It emerged as a subdivision of the Principality of Anhalt from 1252 until 1396, when it was divided into the principalities of Anhalt-Dessau and Anhalt-Köthen. Recreated in 1544, Anhalt-Zerbst finally was partitioned between Anhalt-Dessau, Anhalt-Köthen, and Anhalt-Bernburg in 1796 upon the extinction of the line.
It was created when the Anhalt territory was divided among the sons of Prince Henry I into the principalities of Anhalt-Aschersleben, Anhalt-Bernburg and Anhalt-Zerbst in 1252. In the course of the partition, Prince Siegfried I, the youngest son of Henry I, received the lands around Köthen, Dessau, and Zerbst. His son and successor Prince Albert I took his residence at Köthen Castle in 1295. In 1396, the surviving sons of Prince John II of Anhalt-Zerbst again divided their heritage: Sigismund I became Prince of Anhalt-Dessau and his younger brother Albert IV went on to rule as Prince of Anhalt-Köthen.The principality was recreated, when in 1544 the heirs of Prince Ernest I of Anhalt-Dessau divided their territory and the eldest surviving son, Prince John V, took his residence at Zerbst Castle. The second incarnation, however, lost a lot of territory in 1603 when it was partitioned for a second time with some of its territory being given to Anhalt-Dessau, Anhalt-Bernburg, Anhalt-Plötzkau and Anhalt-Köthen.
By 1606, all Anhalt principalities had turned to the Reformed faith, however, Anhalt-Zerbst returned to Lutheranism in 1644. In 1667, Prince John VI inherited the remote Lordship of Jever in East Frisia. Upon his death in the same year, however, Anhalt-Zerbst lost more of its territory, with Anhalt-Mühlingen and Anhalt-Dornburg being created. The Jever lordship was administered by Ascanian relatives, it was hit hard by the Christmas Flood of 1717.
In 1742 princes John Louis II and Christian August of Anhalt-Zerbst-Dornburg inherited Anhalt-Zerbst. After Christian August's death in 1747, his widow Johanna Elisabeth of Holstein-Gottorp governed the country for her son Frederick Augustus until 1752. She had the new castle at Dornburg built as her thirds from 1750, a lavish baroque palace prepared to host her brother, Adolf Frederick, King of Sweden, or her daughter Sophie Auguste Fredericka, who in 1745 had married the Russian crown prince Peter III, to become empress in 1762, better known as Catherine the Great. However, neither of them ever visited her, and the dowager princess and her son were forced into exile when Prussian forces invaded Anhalt-Zerbst during the Seven Years' War in 1758. Frederick the Great, who had actually proposed the Russian marriage, accused the princess and her son of supporting Russia, then his war enemy. Johanna Elisabeth died in Paris in 1760 and her son, Frederick Augustus, never returned to Zerbst and continued to live in Basel and Luxemburg. Upon his death in 1793, the Principality of Anhalt-Zerbst came to an end with its territory being divided among the Ascanian princes of Anhalt-Dessau, Anhalt-Köthen, and Anhalt-Bernburg while Jever was inherited by his sister, Catherine the Great, and remained under Russian rule until 1818.
Partitioned between Anhalt-Dessau and Anhalt-Köthen in 1396.
To Anhalt-Dessau 1796.