Municipalities of South OstrobothniaThe 18 municipalities of the region of South Ostrobothnia in Finland are divided on four sub-regions.Järviseutu sub-regionAlajärviEvijärviLappajärviVimpeliKuusiokunnat sub-regionAlavus KuortaneSoini'''Ähtäri'''Seinäjoki sub-regionIlmajoki Isokyrö KauhavaKurikkaLapua '''Seinäjoki'''South Eastern Bothnia sub-regionIsojoki Karijoki KauhajokiTeuva