Sarnówek was formerly part of the German Empire. In the German Empire, the place was called Sarnówek.
The place is now called Sarnówek and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Sarnowek | Russian Empire | Lodzˈ | 1914 |
| Sarnówek | Poland | Łódź | 1921 |
| Sarnówek | German Empire | Litzmannstadt/Lodsch | 1939 |
| Sarnówek | Poland | Łódź | 1945 |
| Sarnówek | Poland | Sieradz | 1992 |