Kylmäkoski (Finnish pronunciation: [ˈkylmæˌkoski]; literally meaning "cold rapids") is a former municipality of Finland.

The municipality had a population of 2,610 (31 October 2010)[2] and covered a land area of 190.96 square kilometres (73.73 sq mi).

The coat of arms of Kylmäkoski was designed by Kaj Kajander and confirmed in 1965.

[7] In the 1980s, oven-baked pikeperch and horseradish sauce were named Kylmäkoski's traditional parish dishes.

[8] The Kylmäkoski Prison (Kylmäkosken vankila) is located in the Tipuri's industrial area.