Sosnowiec was formerly part of the German Empire. In the German Empire, the place was called Sosnowiec.
The place is now called Sosnowiec and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Sosnowiec | Russian Empire | Lomža | 1914 |
| Sosnowiec | Poland | Łomża | 1919 |
| Sosnowiec | German Empire | Scharfenwiese | 1939 |
| NN | Poland | Łomża | 1945 |
| Sosnowiec | Poland | Łomża | 1992 |