Tomaszewo was formerly part of the German Empire. In the German Empire, the place was called Tomaszewo.
The place is now called Tomaszewo and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Tomaszewo | Russian Empire | Slupcy | 1914 |
| Tomaszewo | Poland | Konin | 1921 |
| Tomaszewo | German Empire | Konin | 1939 |
| Tomaszewo Dolne | Poland | Słupca | 1945 |
| Tomaszewo Górne | Poland | Słupca | 1945 |
| Tomaszewo | Poland | Konin | 1992 |