Kogin Senegal (Larabci: نهر السنغال Nahr As-sinigāl, Faransanci: Fleuve Sénégal) rafi ne mai tsawon kilomita 1,086 (675 mi) a Yammacin Afirka wanda ya zama iyaka tsakanin Senegal da Mauritania. Tana da kwarin magudanar ruwa mai nisan kilomita 270,000 km2 (100,000 sq mi), matsakaicin kwararawar 680 m3/s (24,000 cu ft/s), da fitowar shekara 21,5 km3 (5.2 cu mi). Muhimman masu bautar ƙasa sune Kogin Falémé, Kogin Karakoro, da Kogin Gorgol. Kogin ya kasu kashi biyu da zarar ya wuce Kaédi reshen hagu, wanda ake kira Doué, yana tafiya daidai da babban kogin zuwa arewa. Bayan kilomita 200 (mil 120) rassan biyu sun sake komawa cikin 'yan kilomita kaɗan daga ƙarƙashin Pondor. A cikin 1972 Mali, Mauritania da Senegal sun kafa Organisation don la mise en valeur du fleuve Sénégal (OMVS) don sarrafa kwarin kogin. Guinea ta shiga cikin 2005. A halin yanzu, kawai ana amfani da kogin sosai don jigilar kayayyaki da fasinjoji. OMVS sun duba yuwuwar ƙirƙirar tashar mai tafiya 55 m (180 ft) a faɗi tsakanin ƙaramin garin Ambidédi a Mali da Saint-Louis, nisan mil 905 (562 mi).