East Africa is a region of Africa. It generally refers to the countries of the valley of the Great African Rift, namely :
The countries of the Horn of Africa
- Eritrea
- Ethiopia
- Djibouti
- South Sudan
- Somalia
And sometimes the Sudan.
The countries of the Great Lakes as part of the Great Rift
- Kenya
- Uganda
- Tanzania
- the Rwanda
- the Burundi
Source : Wikipédia "Afrique de l'Est"