Ethiopia is an African country.
Djibouti ( [ dʒɪˈbuːti ] ; جيبوتي , Djibouti , Jabuuti , Gabuuti ) , officially the Republic of Djibouti , is a country located in the Horn of Africa . Eritrea ( [ ˌɛrᵻˈtreɪ.ə ] or [ ˌɛrᵻˈtriːə ] ኤርትራ , ) , officially the State of Eritrea , is a country in the Horn of Africa . Ethiopia . The Ethiopian Highlands are Africa 's largest continuous mountain ranges , and Sof Omar Caves contain Africa 's largest cave . The Horn of Africa ( Geeska Afrika , Gaaffaa Afriikaa , የአፍሪካ ቀንድ yäafrika qänd , القرن الأفريقي al-qarn al - ` afrīqī , ቀርኒ ኣፍሪቃ ) ( shortened to HOA ) is a peninsula in Northeast Africa . Somalia ( [ səˈmɑːliə , _ soʊ - , _ - ljə ] ; Soomaaliya الصومال ) , officially the Federal Republic of Somalia ( Jamhuuriyadda Federaalka Soomaaliya , جمهورية الصومال الفيدرالية ) , is a country located in the Horn of Africa .