Semeč was formerly part of the German Empire. In the German Empire, the place was called Semeč.
The place is now called Semeč and belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Semtsch | Austro-Hungary | Leitmeritz | before the Treaty of Saint-Germain |
| Semeč | Austro-Hungary | Leitmeritz | before the Treaty of Saint-Germain |
| Semeč | Czechoslovakia | Litoměřice | after the Treaty of Saint-Germain |
| Semtsch | German Empire | Raudnitz an der Elbe | 1939 |
| Semeč | German Empire | Raudnitz an der Elbe | 1939 |
| Semeč | Czechoslovakia | Lovosice | 1945 |
| Semeč | Czechoslovakia | Litoměřice | 1992 |
| Semeč | Czech Republic | Litoměřice | 1993 |