Kogin Nil ya na da tsawon kilomita 4,180. Zurfinta marubba’in kilomita 3,400,000 a kasa. Ta bi cikin Tanzaniya, Uganda, Rwanda, Burundi, Jamhuriyar dimokuradiyya Kwango, Kenya, Ethiopia, Eritrea, Sudan ta Kudu, Sudan da Misra zuwa Tekun Mediterranean ta bi Deltan Nil. Waɗannan biranen na samuwa a gefen kogin Neja: Juba, Khartoum, Kairo, Alexandria.