Piaśnica was formerly part of the German Empire. In the German Empire, the place was called Piasnitz.
The place is now called Piaśnica and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Piasnitz | German Empire | Lauenburg i.Pom. | 1939 |
| Piaśnica | Under Polish administration | Lębork | 1945 |
| Piaśnica | Poland | Gdańsk | 1992 |