Neudek was formerly part of the German Empire. In the German Empire, the place was called Neudek.
The place is now called Nejdek and belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Neudek | Austro-Hungary | Neudek | before the Treaty of Saint-Germain |
| Neydek | Austro-Hungary | Neudek | before the Treaty of Saint-Germain |
| Nejdek | Czechoslovakia | Nejdek | after the Treaty of Saint-Germain |
| Neudek | Czechoslovakia | Nejdek | after the Treaty of Saint-Germain |
| Neudek | German Empire | Neudek | 1938 |
| Nejdek | Czechoslovakia | Karlovy Vary | 1945 |
| Nejdek | Czechoslovakia | Karlovy Vary | 1992 |
| Nejdek | Czech Republic | Karlovy Vary | 1993 |