  ylivieska is a town and municipality of northern ostrobothnia region, finland. it has a population of  (), and it serves as the administrative centre for kalajokilaakso and pyhÃ¤jokilaakso, an area with about 90,000 inhabitants. ylivieska is also the commercial center of the oulu south region, the southern part of the late oulu province. the closest cities near ylivieska are oulu () and kokkola (), the neighbouring municipalities are oulainen, haapavesi, nivala, sievi, kalajoki, alavieska and merijÃ¤rvi. the municipality is unilingually finnish. == geography =
Cities_and_towns_in_Finland Municipalities_of_Northern_Ostrobothnia Populated_places_established_in_1867