Hai Mjini
Hai Mjini is a ward in the Hai District of the Kilimanjaro Region of Tanzania. Its population according to the 2012 census was 34,098.
The ward contains the rapidly growing town of Boma Ng'ombe meaning a bovine palisade. The population of Boma Ng'ombe, based on the 2002 Tanzanian census, was 17,674. Geographically, Boma Ng'ombe is located between the Sanya River and the Mungushi gulch and straddles the Arusha-Himo road about 17 kilometers from the Kilimanjaro International Airport. The headquarters of the Hai District is just to the north of that road. The town has a public market open twice per week. There are numerous schools in Boma Ng'ombe; however, the only A-Level school within the ward as of 2012 was Isala High School.