Sievi is a municipality in Northern Ostrobothnia, Finland. As of 28 February 2023, 4,742 people lived there. Neighbouring municipalities are Haapajärvi, Kalajoki, Kannus, Lestijärvi, Nivala, Reisjärvi, Toholampi and Ylivieska. It was founded in 1867.
Most people speak Finnish.
