Ślazewo was formerly part of the German Empire. In the German Empire, the place was called Schleusen.
The place is now called Ślazewo and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Slazewo | Russian Empire | Kolo | 1914 |
| Ślazewo | Poland | Koło | 1921 |
| Schleusen | German Empire | Warthbrücken | 1939 |
| Ślazewo | Poland | Koło | 1945 |
| Ślazewo | Poland | Włocławek | 1992 |