Jaśkowo was formerly part of the German Empire. In the German Empire, the place was called Reiherswalde.
The place is now called Jaśkowo and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Jaschkowen | German Empire | Johannisburg | 1938 |
| Reiherswalde | German Empire | Johannisburg | 1939 |
| Jaśkowo | Under Polish administration | Pisz | 1945 |
| Jaśkowo | Poland | Suwałki | 1992 |