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