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