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