Seinajoki is a locality located 311.23 km south-southeast from Helsinki in Southern Ostrobothnia, Finland. The population of Seinajoki is 64,150 people. Jakobstad, Jyvaskyla, Kokkola are located close to Seinajoki. You can find Seinajoki on any map using the following decimal coordinates: 62.7903 (latitude), 22.8403 (longitude).