Ostrobothnia County

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Ostrobothnia County Österbottens län Pohjanmaan lääni
County of the Swedish Empire
1634–1775
Capital	Vaasa
History
• Established	1634
• Disestablished	1775
Succeeded by Vaasa Province Oulu Province

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).