Tafkin Nasser (Larabci: بحيرة ناصر Boħēret Nāṣer, Balarabe: [boˈħeːɾet ˈnɑːsˤeɾ]) babban tafki ne a kudancin Misira da arewacin Sudan. Tana daya daga cikin manya manyan tabkuna a duniya. Kafin ginin, Sudan ta sabawa ginin Tafkin Nasser saboda zai mamaye filaye a Arewa, inda mutanen Nubia suke. Dole ne a sake musu wurin zama. A karshen kasar Sudan da ke kusa da yankin Tafkin Nasser galibin tabkin ya mamaye shi. Tsanani, "Tafkin Nasser" yana magana ne kawai ga yanki mafi girma na tabkin da ke yankin ƙasar Masar (kashi 83% na duka), tare da mutanen Sudan waɗanda suka fi son kiran ƙaramin jikinsu na Tafkin Nubia (Balaraben Masar: بحيرة النوبة Boħēret Nubeyya, [Boˈħeːɾet nʊˈbejjæ]). Tekun yana da nisan mil 298 (kilomita 479) da 9.9 kilomita (16 kilomita) a ƙetaren wurin da ya fi faɗi, wanda yake kusa da Tropic of Cancer. Ya mamaye duka fili wanda yakai 5,250 km2 (2,030 sq mi) kuma yana da karfin ajiya na kusan 132 km3 (32 cu mi) na ruwa.