Rasząg was formerly part of the German Empire. In the German Empire, the place was called Raschung.
The place is now called Rasząg and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Raschung | German Empire | Rößel | 1939 |
| Rasząg | Under Polish administration | Reszel | 1945 |
| Rasząg | Poland | Olsztyn | 1992 |