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