Koritnica is a South Slavic place name that may refer to:

Slovenia

* Koritnica (river), a river in northwestern Slovenia, tributary of the Soča * Kal–Koritnica, a village in the Municipality of Bovec, northwestern Slovenia * Koritnica, Krško, a village in the Municipality of Krško, southeastern Slovenia * Koritnica, Tolmin, a village in the Municipality of Tolmin, northwestern Slovenia *Loška Koritnica, a hamlet of Log pod Mangartom, a village in the Municipality of Bovec, northwestern Slovenia

Serbia

* Donja Koritnica, a village in the Municipality of Bela Palanka * Gornja Koritnica, a village in the Municipality of Bela Palanka {{place name disambiguation