Pääjärvi may refer to:
Lakes edit
- 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 edit
- Pyaozersky, a settlement in the Republic of Karelia, Russia, called Pääjärvi in Finnish
People edit
- Magnus Pääjärvi (born 1991), Swedish ice hockey player