Saari (literally Island) is a former municipality of Finland.
It was located in the province of Southern Finland and is part of the South Karelia region. The municipality had a population of 1,411 (2003) and covered an area of 183.08 km2 of which 15.70 km2 is water. The population density was 8.4 inhabitants per km2.
The municipality was unilingually Finnish.
Saari was annexed to Parikkala and Uukuniemi municipalities on 1 January 2005. The new municipality was named Parikkala.