Zanzibar City
Zanzibar City (or Zanzibar Town, often simply referred to as Zanzibar; ; ) is the capital and largest city of Zanzibar, in Tanzania. It is located on the west coast of Unguja, the main island of the Zanzibar Archipelago, roughly due north of Dar es Salaam across the Zanzibar Channel. It also serves as the capital of the Zanzibar Urban/West Region, and qualifies as a district, formally known as Zanzibar Urban District. In 2002 its population was 205,870.
Omanis
Omani presence in the Swahili Coast can be traced since the Nabhani dynasty. In the late seventeenth century, Zanzibar became part of the overseas holdings of Oman after Saif bin Sultan, the imam of Oman, defeated the Portuguese in Mombasa, in what is now Kenya. 
Large numbers of Omanis settled in the Swahili Coast — especially after 1832, when the Omani Sultan Said bin Sultan moved his court to Zanzibar. To the Omanis, the region became a land of economic opportunity. Omanis who migrated to the Swahili Coast looked forward to a better life. The Omani community in the Swahili Coast grew and became financially successful.
Until the middle of 20th century Omanis stopped moving to Zanzibar after a revolution has occurred in Zanzibar in 1964. The Omani descendant, sultan of Zanzibar, Sultan Jamshid bin Abdullah was overthrown, and thousands of Omanis were killed, among many other Arabs. Soon after the revolution, many Omanis fled Zanzibar to avoid persecution and returned to their ancestral homeland Oman, while others chose to remain in the Swahili Coast.