Coincy was formerly part of the German Empire. In the German Empire, the place was called Konzig.
The place is now called Coincy and belongs to France.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Coincy | German Empire | Metz | before the Versailles Treaty |
| Konzich | German Empire | Metz | before the Versailles Treaty |
| Coincy | France | Moselle | after the Versailles Treaty |
| Konzich | German Empire | Metz | 1940 |
| Konzig | German Empire | Metz | 1940 |
| Coincy | France | Moselle | 1945 |
| Coincy | France | Moselle | 1993 |