Sector 9 was one of the major sectors in the city of New Mombasa, Kenya, Earth. It was located on the southwest side of the Mombasa island, and housed a New Mombasa Uplift building, which served as an entrance to Uplift Nature Reserve. A plaza known as New Mombasa Uplift Plaza was located in front of the building, along with a monument to the company.
- This sector is near-identical to Sector 0, which is located on the opposite side of the city.
- In Halo 3: ODST, the southernmost part of this sector is partially inaccessible due to Covenant Anti-Vehicle Barriers.
- In the hub level Mombasa Streets in Halo 3: ODST, the beacon object for Dutch's flashback level Uplift Reserve can be found in this area.