Blatná was formerly part of the German Empire. In the German Empire, the place was called Blatná.
The place is now called Blatná and belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Blatna | Austro-Hungary | Blatna | before the Treaty of Saint-Germain |
| Blatná | Austro-Hungary | Blatna | before the Treaty of Saint-Germain |
| Blatná | Czechoslovakia | Blatná | after the Treaty of Saint-Germain |
| Blatna | German Empire | Blatna | 1939 |
| Blatná | German Empire | Blatna | 1939 |
| Blatná | Czechoslovakia | Blatná | 1945 |
| Blatná | Czechoslovakia | Strakonice | 1992 |
| Blatná | Czech Republic | Strakonice | 1993 |