Horní Plezom was formerly part of the German Empire. In the German Empire, the place was called Ober Plesau.
The place is now called Horní Plezom and belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Ober-Plesau | Austro-Hungary | Mies | before the Treaty of Saint-Germain |
| Horní Plezomy | Austro-Hungary | Mies | before the Treaty of Saint-Germain |
| Horní Plezom | Czechoslovakia | Stříbro | after the Treaty of Saint-Germain |
| Ober-Plesau | Czechoslovakia | Stříbro | after the Treaty of Saint-Germain |
| Ober Plesau | German Empire | Mies | 1938 |
| Horní Plezom | Czechoslovakia | Stříbro | 1945 |
| Horní Plezom | Czechoslovakia | Tachov | 1992 |
| Horní Plezom | Czech Republic | Tachov | 1993 |