Sarnik was formerly part of the German Empire. In the German Empire, the place was called Rehfeld.
The place is now called Sarnik and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Rehfeld | German Empire | Soldin | 1939 |
| Sarnik | Under Polish administration | Myślibórz | 1945 |
| Sarnik | Poland | Gorzów | 1992 |