Poruba was formerly part of the German Empire. In the German Empire, the place was called Poremba.
The place is now called Poruba (Orlová-Poruba) and belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Poremba | Austro-Hungary | Freistadt/Frysztat, Fryštát | before the Treaty of Saint-Germain |
| Poręba | Austro-Hungary | Freistadt/Frysztat, Fryštát | before the Treaty of Saint-Germain |
| Poruba | Austro-Hungary | Freistadt/Frysztat, Fryštát | before the Treaty of Saint-Germain |
| Poruba | Czechoslovakia | Fryštát | after the Treaty of Saint-Germain |
| Poręba | Poland | Frysztat/Fryštát | 1938 |
| Poremba | German Empire | Teschen | 1939 |
| Poruba (Orlová-Poruba) | Czechoslovakia | Karviná | 1945 |
| Poruba (Orlová-Poruba) | Czechoslovakia | Karviná | 1992 |
| Poruba (Orlová-Poruba) | Czech Republic | Karviná | 1993 |