Iijärvi
Iijärvi refers to several lakes in Finland:
- Iijärvi (Näätämöjoki) , lake in the municipality of Inari (Lapland)
 - Iijärvi (Kiehimänjoki) , lake in the municipality of Ristijärvi (Kainuu)
 - Iijärvi (Iijoki) , lake in the municipality of Kuusamo (Northern Ostrobothnia)
 - Iijärvi (Hossanjoki) , lake in the municipalities of Kuusamo (Northern Ostrobothnia) and Suomussalmi (Kainuu)
 - Iijärvi (Saimaa) , lake in the municipality of Sulkava (South Savo)