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