Kati District (Wilaya ya Kati in Swahili) is one of two administrative districts of Unguja South Region in Tanzania.

[1] The district covers an area of 505.8 km2 (195.3 sq mi).

[2] The district is comparable in size to the land area of Guam.

[3] The district has a water border to the east and west by the Indian Ocean.

The district is the birthplace of Bi Kidude, most famous Zanzibari musician born in Kitumba Village.