Sieroszów was formerly part of the German Empire. In the German Empire, the place was called Seitendorf.
The place is now called Sieroszów and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Seitendorf | German Empire | Frankenstein i. Schles. | 1939 |
| Sieroszów | Under Polish administration | Ząbkowice Śląskie | 1945 |
| Sieroszów | Poland | Wałbrzych | 1992 |