Kortmedin was formerly part of the German Empire. In the German Empire, the place was called Kortmedien.
The place is now called Kostromino * and belongs to Russian Federation.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Kortmedien | German Empire | Wehlau | 1939 |
| Kortmedin | Under Soviet administration | Kaliningrad | 1945 |
| Kostromino * | Russian Federation | Pravdinsk | 1992 |