Its boundaries stretch across Viti Levu in a southeast to northwest direction from Laucala Bay on the Suva Peninsula to beneath Mt Tomanivi, Fiji's highest mountain on the Nadrau Plateau ("Mai na toba ko Laucala ki na ruku i Tomanivi" in Fijian).
Newer Suburbs of Suva City, such as Samabula North, Tamavua, Namadi, Tacirua, Wailoku, Cunningham and Khalsa sit within Naitasiri's borders.
Naitasiri's natural resources include the Medrausucu mountain ranges, vast indigenous forests, five river systems and fertile agricultural land.
Prior to roads being built, the five rivers that flow through the province, the Wainibuka, Wainimala, Waidina, Waimanu and the Rewa were the main avenues of travel and communications.
The earliest recorded white contact with Colo hill tribes is credited to Rev Williams in 1858.
However, it was after Reverend Frederick Langham, the Wesleyan minister journeyed to Christianize the Taukei ni Waluvu in 1862 that more coastal and white contact became regular.
With no quarantine laws in place, they inadvertently carried with them the disease from aboard HMS Dido to Navuso.
The measles epidemic that befell Fiji in 1875 from January to about June 1875 and wiped out 30 per cent or 50,000 of its indigenous population was a tragedy of the first order.
The formation of the political party Soqosoqo Duavata ni Lewenivanua (SDL) after the May coup of 2000 was on the initiative of the chiefs and people of Naitasiri.