Yankin Karelian Isthmus yanki ne na yanki da ke arewa maso yammacin kasar Rasha, wanda ya hada babban yankin kasar Rasha zuwa gabar yammacin kasar, yankin Rybachy. Kalmar “isthmus” tana nufin ƙunƙutun ƙasa da ke haɗa manyan ƙasa guda biyu, yawanci ruwa ya raba su. Karelian Isthmus yana tsakanin Gulf of Finland da tafkin Ladoga kuma an san shi da kyawawan dabi'unsa da tarihinsa. Yankin ya kasance wurin da aka yi yaƙe-yaƙe da rikice-rikice da yawa a cikin tarihi, ciki har da Yaƙin Rasha da Sweden da Yaƙin Duniya na Biyu.