Pieniężno was formerly part of the German Empire. In the German Empire, the place was called Mehlsack.
The place is now called Pieniężno and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Mehlsack | German Empire | Braunsberg (Ostpr.) | 1939 |
| Pieniężno | Under Polish administration | Braniewo | 1945 |
| Pieniężno | Poland | Elbląg | 1992 |