Obkaß was formerly part of the German Empire. In the German Empire, the place was called Oberwalden.
The place is now called Obkaz and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Obkaß | German Empire | Flatow | before the Versailles Treaty |
| Obkas | Poland | Sępólno | after the Versailles Treaty |
| Oberwalden | German Empire | Zempelburg | 1939 |
| Obkaz | Poland | Chojnice | 1945 |
| Obkaz | Poland | Bydgoszcz | 1992 |