Dobrogosty-Tańsk was formerly part of the German Empire. In the German Empire, the place was called Dobrogosty Tansk.
The place is now called Dobrogosty-Tańsk and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Dobrogosty Tansk | Russian Empire | Prasnyš | 1914 |
| Dobrogosty-Tańsk | Poland | Przasnysz | 1919 |
| Dobrogosty Tansk | German Empire | Praschnitz | 1939 |
| Tańsk-Dobrogosty | Poland | Przasnysz | 1945 |
| Dobrogosty-Tańsk | Poland | Ciechanów | 1992 |