Kortowo was formerly part of the German Empire. In the German Empire, the place was called Kortau.
The place is now called Kortowo and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Kortau | German Empire | Allenstein (St.Kr.) | 1939 |
| Kortowo | Under Polish administration | Olsztyn m. | 1945 |
| Kortowo | Poland | Olsztyn | 1992 |