Ustkow was formerly part of the German Empire. In the German Empire, the place was called Ustków.
The place is now called Ustków and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Ustkow | Russian Empire | Turek | 1914 |
| Ustków | Poland | Turek | 1921 |
| Ustków | German Empire | Turek | 1939 |
| Ustków | Poland | Turek | 1945 |
| Ustków | Poland | Sieradz | 1992 |