Sielc-Kolonja was formerly part of the German Empire. In the German Empire, the place was called Sielc Kolonie.
The place is now called Sielc-Kolonia and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Sielc Kolonja | Russian Empire | Makov | 1914 |
| Sielc-Kolonja | Poland | Maków | 1919 |
| Sielc Kolonie | German Empire | Mackeim | 1939 |
| Sielc-Kolonia | Poland | Maków Mazowiecki | 1945 |
| Sielc-Kolonia | Poland | Ostrołęka | 1992 |