The Geba is a river of West Africa that rises in Guinea, passes through Senegal, and reaches the Atlantic Ocean in Guinea-Bissau. It is about 340 miles in total length.

Its tributary the Colufe River joins the Geba at Bafatá. After passing by Geba town and Bambadinca , the river broadens into a wide estuary below Xime (where it is joined by the Corubal River), with a total width of about 10 miles at Bissau.

It has long been an important trade route connecting into the interior; it is accessible to 2,000-ton ships some 90 miles in, and shallow-draft vessels even further.