Iijärvi

Iijärvi is a common name of lakes in Finland. It may refer to
 * Lake Iijärvi (Inari) in Inari, Finnish Lapland
 * Lake Iijärvi (Kuusamo), North-eastern Finland
 * Lake Iijärvi (Suomussalmi), North-eastern Finland
 * Lake Iijärvi (Ristijärvi), Kainuu, Finland
 * Lake Iijärvi (Sulkava), Finland