Korpilahti is a former municipality of Finland. Together with Jyväskylän maalaiskunta, Korpilahti was consolidated with Jyväskylä on January 1, 2009. It is located in the former province of Western Finland and is part of the Central Finland region. There are about 4,500 summer-time inhabitants visiting the 2,000 summer cottages. The municipality is unilingually Finnish. The municipality was also known as "Korpilax" in Swedish.