Osmolin was formerly part of the German Empire. In the German Empire, the place was called Osmolin.
The place is now called Osmolin and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Osmolin | Russian Empire | Gostyn | 1914 |
| Osmoliń | Poland | Gostynin | 1921 |
| Osmolin | German Empire | Waldrode | 1939 |
| Osmolin | Poland | Gostynin | 1945 |
| Osmolin | Poland | Płock | 1992 |