Ilnica was formerly part of the German Empire. In the German Empire, the place was called Henningswalde.
The place is now called Ilnica and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Henningswalde | German Empire | Schlawe i.Pom. | 1939 |
| Ilnica | Under Polish administration | Sławno | 1945 |
| Ilnica | Poland | Słupsk | 1992 |