The Indian diaspora in Tanzania emerged in waves from the subcontinent. While its internal religious and cultural diversity has been a hallmark, the diaspora accreted into a political category and community identity through the crucibles of colonialism and nationalism. Its origins were more disparate. East Africa and western India—especially peninsular Gujarat and Kutch—were fused by the monsoon winds that drove premodern Indian Ocean trade, when small numbers of Indian merchants sojourned and settled across the sea. The diaspora received a fillip after the Sultan of Oman shifted his capital to Zanzibar in 1840, granting positions to Indians and attracting trade and migration, largely of Indian Muslims.
Britain used the suppression of the slave trade—in which its Indian subjects had participated vigorously—as a wedge to declare a protectorate over Zanzibar and established Tanganyika on the mainland after German East Africa was ceded following World War I. This was a boom time for settlement from India, and while the migrants were mostly poor, they thrived in the transformation into an imperial diaspora, working within segregated colonial structures and attaining advantages denied to Africans. Indians—a majority of them Shia Muslims of several sects—numbered around 110,000 when African nationalism won independence in Tanganyika and Zanzibar in the early 1960s, and in the postcolonial period their privilege made them targets of public animosity and state action. While protected by the inclusivist first president of united Tanzania, the diaspora integrated into the new nation in limited ways. When socialist reforms nationalized housing and made business challenging in the 1960s and 1970s, almost half of the Indians left, largely to Canada and the United Kingdom. Those who remained suffered occasional moments of political pressure even after socialism collapsed, but in the early decades of the 21st century they continue to reside in urban centers as a secure but marked minority with lives revolving around commerce and diverse community institutions.
India Beyond India: The Indian Diaspora in East Africa