Scorpions of Djibouti, Eritrea, Ethiopia, and Somalia are revised, with a key and geographic distributions given for all the species. Lectotypes are designated for Buthus minax L. Koch, 1875, Buthus hottentotta tigrinus Caporiacco, 1937, Parabuthus granimanus Pocock, 1895, Parabuthus granimanus fuscicauda Caporiacco, 1947, Parabuthus mixtus obscurior Caporiacco, 1941, Parabuthus mixtus Borelli, 1925, Scorpio cavimanus Pocock, 1888, Pandinus intermedius Borelli, 1919, Scorpio pallidus Kraepelin, 1894, and Scorpio smithi Pocock, 1897. Neobuthus Hirst, 1911 is synonymized with Butheolus Simon, 1882. The following species are synonymized: Neobuthus berberensis Hirst, 1911 with Butheolus ferrugineus Kraepelin, 1898; Buthus hottentotta tigrinus Caporiacco, 1937 with Hottentotta minax (L. Koch, 1875); Buthus fuscitruncus Caporiacco, 1936 with Hottentotta trilineatus (Peters, 1862); Parabuthus granimanus fuscicauda Caporiacco, 1947 with Parabuthus granimanus Pocock, 1895; Parabuthus heterurus stefaninii Caporiacco, 1927 with Parabuthus heterurus Pocock, 1897; Parabuthus leiosoma abyssinicus Pocock, 1901 and Parabuthus leiosoma dmitrievi Birula, 1903 with Parabuthus leiosoma (Ehrenberg, 1828); Parabuthus mixtus Borelli, 1925, Parabuthus mixtus obscurior Caporiacco, 1941, and Parabuthus zavattarii Caporiacco, 1939 with Parabuthus pallidus Pocock, 1895; Uroplectes fischeri caporiaccoi Fet, 1997 and Uroplectes patrizii Caporiacco, 1936 with Uroplectes fischeri (Karsch, 1879); Scorpio gregoryi Pocock, 1896 with Pandinus (Pandinurus) exitialis (Pocock, 1888); Brotheas hirsutus L. Koch, 1875 and Scorpio africanus subtypicus Kraepelin, 1894 with Pandinus (Pandinurus) magrettii Borelli, 1901; and Pandinus intermedius Borelli, 1919 and Pandinus citernii Borelli, 1919 with Pandinus (Pandinus) phillipsii (Pocock, 1896). Uroplectes pardii sp. n. from Somalia and Parabuthus eritreaensis sp. n. and Pandinus (Pandinops) eritreaensis sp. n. from Eritrea are described. Hottentotta minax niloticus Birula, 1928 is elevated to a full-species status. First records are established for Leiurus quinquestriatus Ehrenberg, 1828 in Somalia, Lychas obsti Kraepelin, 1913 in Ethiopia and Somalia, Pandinus (Pandinops) hawkeri Pocock, 1900 in Ethiopia, and Pandinus (Pandinurus) exitialis (Pocock, 1888) in Somalia.