Korpilahti is a former municipality of Finland. Together with Jyväskylän maalaiskunta, Korpilahti was consolidated with Jyväskylä on January 1, 2009.
The municipality had a population of 5,016 (2003). In addition to this, there are about 4,500 summer-time inhabitants visiting the 2,000 summer cottages.
Korpilahti covered an area of 794.62 km² of which 177.44 km² is water. The population density was 6.3 inhabitants per km²