Pääjärvi

Pääjärvi may refer to:

Lakes

 * Pääjärvi (Karstula), located in Karstula in the region of Keski-Suomi, Finland
 * Pääjärvi (Lammi), located between the cities of Hämeenlinna and Hämeenkoski, Finland
 * Lake Pyaozero (Finnish: Pääjärvi), located in the Republic of Karelia, Russia

Settlements

 * Pyaozersky, a settlement in the Republic of Karelia, Russia, called Pääjärvi in Finnish

People

 * Magnus Pääjärvi (born 1991), Swedish ice hockey player