Dlouhé was formerly part of the German Empire. In the German Empire, the place was called Dlouhé.
The place is now called Dlouhé and belongs to Czechoslovakia.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Dlouhei | Austro-Hungary | Neustadt a. d. Mettau | before the Treaty of Saint-Germain |
| Dlouhý | Austro-Hungary | Neustadt a. d. Mettau | before the Treaty of Saint-Germain |
| Dlouhé | Czechoslovakia | Nové Město nad Metují | after the Treaty of Saint-Germain |
| Langenau | German Empire | Neustadt an der Mettau | 1939 |
| Dlouhé | German Empire | Neustadt an der Mettau | 1939 |
| Dlouhé | Czechoslovakia | Nové Město nad Metují | 1945 |
| Dlouhé | Czechoslovakia | Východní Čechy | 1992 |