Barghash , in full Barghash ibn Saʿīd (born c. 1834—died March 27, 1888, Zanzibar [now in Tanzania]), sultan of Zanzibar (1870–88), a shrewd and ambitious ruler, who, for most of his reign, looked to Britain for protection and assistance but eventually saw his domains divided between Germany and his former protector.

Although not the first heir to the throne of his father, Saʿīd ibn Sultān, Barghash had made plans to seize the throne at his father’s death in 1856; he was, however, forestalled by the rightful heir, his brother Mājid, and spent two years in exile in Bombay. Shortly after Barghash came to power (1870), his longtime friend John Kirk became British consul. Kirk, a strong advocate of British support of Zanzibar, forced Barghash to sign an antislavery treaty in 1873 and two further proclamations in 1876 to close additional slave-trade loopholes. The British government (despite Kirk’s recommendations) was not prepared to support actively the extension of Barghash’s authority in the interior, but British pressure did discourage Egyptian expansion along the East African coast in 1875.

Recognizing his political and military weakness, Barghash afterward looked to Britain both as a protector and as a source of technical and military aid. In the following years, with British help, he created a small but modern army and attempted to modernize his government. By 1882, however, he recognized the threat posed by Belgian King Leopold II’s determination to control the rich ivory trade of the Congo basin. At first Barghash tried to prevent that control by supporting the state-building efforts of the Arab trader Tippu Tib. But when Leopold’s claims had been recognized by other European powers in 1885 and Germany was claiming most of present-day Tanzania, the disillusioned Barghash had no choice but to acquiesce in the dismemberment of his kingdom late in 1886.