Olkusz was formerly part of the German Empire. In the German Empire, the place was called Ilkenau.
The place is now called Olkusz and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Olkusz | Russian Empire | Olˈkuš | 1914 |
| Olkusz | Poland | Olkusz | 1919 |
| Olkusch | German Empire | Bendzin/Bendsburg | 1939 |
| Ilkenau | German Empire | Bendzin/Bendsburg | 1939 |
| Olkusz | Poland | Olkusz | 1945 |
| Olkusz | Poland | Katowice | 1992 |