Janówek was formerly part of the German Empire. In the German Empire, the place was called Ober Johnsdorf.
The place is now called Janówek and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Ober Johnsdorf | German Empire | Reichenbach (Eulengebirge) | 1939 |
| Janówek | Under Polish administration | Dzierżoniów | 1945 |
| Janówek | Poland | Wrocław | 1992 |