| Native Name: | (Teil-)Herzogtum Pommern-Demmin (German) Księstwo dymińskie (Polish) Ducatus Dyminiensis (Latin) |
| Conventional Long Name: | Duchy of Pomerania-Demmin |
| Common Name: | Pomerania-Demmin |
| Era: | High Middle Ages Late Middle Ages |
| Status: | Duchy |
| Status Text: | State of the Holy Roman Empire |
| Government Type: | Feudal duchy |
| Life Span: | 1160–1264 |
| Date Start: | 1160 |
| Event Start: | Partition of the Duchy of Pomerania |
| Event End: | Unification of the Duchy of Pomerania |
| Year End: | 1264 |
| P1: | Duchy of Pomerania |
| Flag P1: | Grunwald Słupsk i Szczecin.svg |
| Border P1: | no |
| S1: | Duchy of Pomerania |
| Flag S1: | Grunwald Słupsk i Szczecin.svg |
| Border S1: | no |
| Capital: | Demmin |
| Religion: | Roman Catholic |
| Title Leader: | Duke |
| Leader1: | Casimir I |
| Year Leader1: | 1160–1180 (first) |
| Leader2: | Wartislaw III |
| Year Leader2: | 1219/1920–1264 (last) |
| Today: | Poland Germany |
The Duchy of Pomerania-Demmin, also known as the Duchy of Demmin, and the Duchy of Dymin, was a feudal duchy in Western Pomerania within the Holy Roman Empire. Its capital was Demmin. It was ruled by the Griffin dynasty. It existed in the High Middle Ages era, between 1160 and 1264.[1] [2] [3]
The state was formed in 1160, in the partition of the Duchy of Pomerania, with duke Casimir I, as its first ruler.[1] [2] After death of its last ruler, duke Wartislaw III, the state was united with Pomerania-Stettin, forming the Duchy of Pomerania.[3]