Ostrobothnia County
| Ostrobothnia County Österbottens län Pohjanmaan lääni |
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| County of the Swedish Empire | |||||
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| Capital | Vaasa | ||||
| History | |||||
| • | Established | 1634 | |||
| • | Disestablished | 1775 | |||
Ostrobothnia County (Swedish: Österbottens län, Finnish: Pohjanmaan lääni) was a county of the Swedish Empire from 1634 to 1775.
The county was split in 1755 to County of Vasa (Swedish: Vasa län, Finnish: Vaasan lääni) and County of Uleåborg (Swedish: Uleåborg län, Finnish: Oulun lääni).
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