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