| Siha | |
| Official Name: | Wilaya ya Siha, Mkoa wa Kilimanjaro |
| Nickname: | West Kili |
| Settlement Type: | District |
| Coordinates: | -3.1864°N 37.0686°W |
| Subdivision Type: | Country |
| Subdivision Name: | Tanzania |
| Subdivision Type1: | Region |
| Subdivision Name1: | Kilimanjaro Region |
| Subdivision Type2: | District |
| Established Title: | District |
| Seat Type: | Capital |
| Seat: | Sanya Juu |
| Area Total Km2: | 1,217 |
| Elevation Max M: | 3,952 |
| Elevation Max Point: | Klute Peak, Shira Plateau, Mount Kilimanjaro |
| Population Demonym: | Sihan |
| Population As Of: | 2022 |
| Population Total: | 139,019 |
| Population Density Km2: | auto |
| Postal Code Type: | Tanzanian Postal Code |
| Postal Code: | 25-4 |
| Demographics Type1: | Ethnic groups |
| Demographics1 Title1: | Settler |
| Demographics1 Info1: | Swahili |
| Demographics1 Title2: | Native |
| Demographics1 Info2: | Chaga |
Siha is one of the seven administrative districts of Kilimanjaro Region in Tanzania.[1] The district covers approximately 1217km2.[2] It is bordered to the west by Meru District in Arusha Region and to the northeast by Rombo District and the southeast Hai District. The western part of Mount Kilimanjaro is located within the district's boundaries.
According to the 2022 Tanzania National Census, the population of Siha District was 139,019.[3] [4]
As of 2012, Siha District was administratively divided into 12 wards.