Southern Ostrobothnia is a region in western Finland. As of 2013, about 194,000 people lived there. The City of Seinäjoki is the center of the Southern Ostrobothnia.
Neighbouring regions are Ostrobothnia, Central Ostrobothnia, Central Finland, Pirkanmaa and Satakunta.
Southern Ostrobothnia has 18 municipalities, 8 of those are cities, listed below.