Sayabec (/seɪbɛk/) is a municipality located in the La Matapédia Regional County Municipality (RCM) in the Bas-Saint-Laurent, Quebec, Canada. It is located in the Matapédia Valley between the Chic-Choc Mountains of the Appalachian near the Lake Matapédia. The main activities of the village are agriculture and forestry. It has a population of approximately 2,000, the third biggest municipality in its RCM after Amqui and Causapscal.