Pohjanmaa (Swedish: Österbotten, English: Ostrobothnia) is the name of a geographical region in Finland which can refer to:

• Ostrobothnia (historical province) formerly called Pohjanmaa, a Historical province of Finland (until 1809 belonging to Sweden)
• Österbotten County (Pohjanmaan lääni), a former County of Sweden

Pohjanmaa (Swedish: Österbotten, English: Ostrobothnia) is the name of a geographical region in Finland which can refer to:

• Ostrobothnia (historical province) formerly called Pohjanmaa, a Historical province of Finland (until 1809 belonging to Sweden)
• Österbotten County (Pohjanmaan lääni), a former County of Sweden