Mikołajki was formerly part of the German Empire. In the German Empire, the place was called Thomken.
The place is now called Mikołajki and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Mikolaiken | German Empire | Lyck | 1938 |
| Thomken | German Empire | Lyck | 1939 |
| Mikołajki | Under Polish administration | Ełk | 1945 |
| Mikołajki | Poland | Suwałki | 1992 |