Madatsar ruwan Akosombo, wanda kuma aka fi sani da Madatsar ruwan Volta (da Turanci Akosombo Dam ko Volta Dam), madatsar ruwa ce da ke kan Kogin Volta da ke kudu maso gabashin Ghana a cikin kwazazzabar Akosombo da wani bangare na hukumar Kogin Volta. Gina madatsar ruwan ya mamaye wani ɓangare na Kogin Volta, kuma ya haifar da ƙirƙirar Tafkin Volta mai zuwa. Ambaliyar da ta haifar da tafkin Volta ya raba mutane da dama da muhallansu kuma ya yi matukar tasiri ga yanayin yankin. Tafkin Volta shine babban tafki da mutum yayi a duniya ta hanyar yanki. Tana ɗaukar 8,502 square kilometres (3,283 sq mi), wanda shine 3.6% na yankin ƙasar Ghana. Tare da girman kilomita dubu dari da arba'in da takwas, Tafkin Volta shine tafki na uku mafi girma a duniya da mutum yayi da girma, mafi girma shine Tafkin Kariba wanda yake tsakanin Zimbabwe da Zambiya a Kudancin Afirka kuma yana da ruwa mai tsawon cubic kilomita 185. Manufa ta farko na Akosombo Dam ya zuwa samar da wutar lantarki ga aluminum masana'antu. An kira Dam din Akosombo "mafi girman jari guda cikin tsare-tsaren bunkasa tattalin arzikin Ghana."