Mijaczów was formerly part of the German Empire. In the German Empire, the place was called Mijaczow.
The place is now called Mijaczów and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Mijaczów | Russian Empire | Bendin | 1914 |
| Mijaczów | Poland | Będzin | 1919 |
| Mijaczow | German Empire | Zawiercie/Warthenau | 1939 |
| Mijaczów | Poland | Zawiercie | 1945 |
| Mijaczów | Poland | Częstochowa | 1992 |