Płocko was formerly part of the German Empire. In the German Empire, the place was called Plötzig.
The place is now called Płocko and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Plötzig | German Empire | Rummelsburg i.Pom. | 1939 |
| Płocko | Under Polish administration | Miastko | 1945 |
| Płocko | Poland | Słupsk | 1992 |