Kannus is a town and municipality of Finland. It is situated in the province of Western Finland and is part of the Central Ostrobothnia region. The municipality has a population of 5,251 (31 August 2024) and covers an area of 470.65 square kilometres (181.72 sq mi), of which 2.41 km2 (0.93 sq mi) is water. The population density is 11.22 inhabitants per square kilometre (29.1/sq mi). The municipality is unilingually Finnish. Neighbour municipalities are Kalajoki, Kokkola, Sievi and Toholampi.
The area of Kannus was long inhabited by Sámi. This is also indicated by the name of the town, which means Sámi witch drum. The hammer of the witch drum in the coat of arms of the town also refers to the same.