- Date
- Date 21 February 1808 – 17 September 1809, (1 year, 6 months, 3 weeks and 6 days)
- Location
- Finland and Sweden
- Result
- Russian victory
- Territorial changes
- Treaty of Fredrikshamn (Sweden loses Finland , Åland , a part of Lapland and a part of West Bothnia , from which the Grand Duchy of Finland was constituted, an autonomous part of the Russian Empire .)