Sadkowo-Majory was formerly part of the German Empire. In the German Empire, the place was called Sadkowo.
The place is now called Sadkowo-Żury and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Sadkowo Majory | Russian Empire | Plonsk | 1914 |
| Sadkowo Chrzypty | Russian Empire | Plonsk | 1914 |
| Sadkowo Zury | Russian Empire | Plonsk | 1914 |
| Sadkowo-Majory | Poland | Płońsk | 1919 |
| Sadkowo-Chrzypty | Poland | Płońsk | 1919 |
| Sadkowo-Żury | Poland | Płońsk | 1919 |
| Sadkowo | German Empire | Plöhnen | 1939 |
| Sadkowo-Majory | Poland | Płońsk | 1945 |
| Sadkowo-Chrzypty | Poland | Płońsk | 1945 |
| Sadkowo-Żury | Poland | Płońsk | 1945 |
| Sadkowo-Majory | Poland | Ciechanów | 1992 |
| Sadkowo-Chrzypty | Poland | Ciechanów | 1992 |
| Sadkowo-Żury | Poland | Ciechanów | 1992 |