Długi Kąt was formerly part of the German Empire. In the German Empire, the place was called Dlugikont.
The place is now called Długi Kąt and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Dlugi Kat | Russian Empire | Ostrolenka | 1914 |
| Długi Kąt | Poland | Ostrołęka | 1919 |
| Dlugikont | German Empire | Scharfenwiese | 1939 |
| Długi Kąt | Poland | Ostrołęka | 1945 |
| Długi Kąt | Poland | Ostrołęka | 1992 |