Jizerka was formerly part of the German Empire. In the German Empire, the place was called Wilhelmshöhe.
The place is now called Jizerka and belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Wilhelmshöhe | Austro-Hungary | Friedland (Isergebirge) | before the Treaty of Saint-Germain |
| Jizerka | Czechoslovakia | Frýdlant | after the Treaty of Saint-Germain |
| Klein-Iser | Czechoslovakia | Frýdlant | after the Treaty of Saint-Germain |
| Wilhelmshöhe | Czechoslovakia | Frýdlant | after the Treaty of Saint-Germain |
| Klein Iser | German Empire | Gablonz a. d. Neiße | 1938 |
| Wilhelmshöhe | German Empire | Gablonz a. d. Neiße | 1938 |
| Jizerka | Czechoslovakia | Frýdlant | 1945 |
| Jizerka | Czechoslovakia | Jablonec nad Nisou | 1992 |
| Jizerka | Czech Republic | Jablonec nad Nisou | 1993 |