Strmec was formerly part of the German Empire. In the German Empire, the place was called Steilberg.
The place is now called Strmec and belongs to Slovenia.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Stermitzberg | Austro-Hungary | Cilli/Celje | before the Treaty of Saint-Germain |
| Strmec | Austro-Hungary | Cilli/Celje | before the Treaty of Saint-Germain |
| Strmec | Yugoslavia | Gornji grad | after the Treaty of Saint-Germain |
| Steilberg | German Empire | Cilli | 1941 |
| Strmec | Yugoslavia | Celje | 1945 |
| Strmec | Yugoslavia | Socialistična rep. Slovenija | 1992 |
| Strmec | Slovenia | Slowenien | 1991 |