Bothnia or Bothnian may refer to:
- Gulf of Bothnia, a gulf of the Baltic Sea between Sweden and Finland
- Bothnian Bay, the northernmost waters of the gulf
- Bothnian Sea, the southernmost waters of the gulf
- Provinces in Sweden and Finland named after the gulf:
- Ostrobothnia (disambiguation), multiple entities
- West Bothnia, located west of the gulf
- North Bothnia, located northwest of the gulf
- "Rear Bothnia", or Peräpohjola, southern part of Finnish Lapland
- SS Bothnia, transatlantic steamship (1874âÂÂ99)
- Bothnia Line, high speed railway in northern Sweden
- Bothnian Highway, a main road between Kaskinen and Seinäjoki
Similar spellings