Kłączno was formerly part of the German Empire. In the German Empire, the place was called Ulrichsdorf (Pom.).
The place is now called Kłączno and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Kloschen | German Empire | Bütow | 1937 |
| Ulrichsdorf (Pom.) | German Empire | Bütow | 1939 |
| Kłączno | Under Polish administration | Bytów | 1945 |
| Kłączno | Poland | Słupsk | 1992 |