Ćwiersk was formerly part of the German Empire. In the German Empire, the place was called Cwiersk.
The place is now called Ćwiersk and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Cwiersk | Russian Empire | Plonsk | 1914 |
| Ćwiersk | Poland | Płońsk | 1919 |
| Cwiersk | German Empire | Plöhnen | 1939 |
| Ćwiersk | Poland | Płońsk | 1945 |
| Ćwiersk | Poland | Ciechanów | 1992 |