Tongoni is an administrative ward in Tanga City Council of Tanga Region in Tanzania. Tangasisi and Maweni wards form the ward's northern and western boundaries. The Pemba Channel forms the eastern boundary. The Kigombe Ward of Muheza is to the south. The wards of Kirare and Marungu are to the west. The ward covers an area of 44 km2 (17 sq mi), and has an average elevation of 30 m (98 ft). According to the 2012 census, the ward has a total population of 4,594. Tongoni ward is the home to the Tongoni ruins, a Medieval Swahili town.

Tanga City Council is one of eleven administrative districts of Tanga Region in Tanzania. The District covers an area of 596.5 km2 (230.3 sq mi) of which includes the historic city of Tanga and the Port of Tanga. Tanga district is bordered to the north by Mkinga District, to the east by the Indian Ocean, to the south and west by Muheza District. The district is comparable in size to the land area of Guam. The administrative seat is the ward Central. The district is the administrative and economic center of Tanga Region. In Swahili, the word Tanga means "sail". The City was also the theater for the battle of Tanga. According to the 2022 census, the district has a total population of 393,429.