The Ngong Hills are peaks in a ridge along the Great Rift Valley, located southwest near Nairobi, in southern Kenya. The word "Ngong" is an Anglicization of a Maasai phrase "enkong'u emuny" meaning rhinoceros spring, and this name derives from a spring located near Ngong Town.
The Ngong Hills, from the eastside slopes, overlook the Nairobi National Park and, off to the north, the city of Nairobi. The Ngong Hills, from the westside slopes, overlook the Great Rift Valley dropping over 1,000 m (3,281 ft) below, where Maasai villages have been developed. The peak of the Ngong Hills is at 2,460 m (8,071 ft) above sea level.
During the years of British colonial rule, the area around the Ngong Hills was a major settler farming region, and many traditional colonial houses are still seen in the area. In the 1985 film Out of Africa, the four peaks of the Ngong Hills appear in the background of several scenes near Karen Blixen's house. Local residents still reported seeing lions in the Hills during the 1990s. The solitary grave of Denys Finch Hatton, marked by an obelisk and garden, is located on the eastern slopes of the Ngong Hills, overlooking the Nairobi National Park.
There is a walking trail along the tops of the Ngong Hills. Kenya Forestry Service has a small post at the NE foot of the park. There is a KSH 600 fee for visitors. Local residents have sometimes held Sunday church services on the southern peak, overlooking the Great Rift Valley.
Near the hills is the town of Ngong. The Ngong Hills Wind Power Station was completed in 2015. This is the first wind farm in the country. Kenya Forestry Service offers guides/security to accompany hikers for an extra fee (KES 2000).
Ngong Hills Mbagathi Water Resource Users Association / Ngong Hills Mbagathi WRUA has been very aggressive in making the Ngong area Water Catchment area better by planting indigenous seedling and towns cleaning activities. If the world agree to plant trees and take care of the our environment we shall reverse the climate change. Ngong Water catchment area covers Thogoto, Kibiko, Oloolua and Ngong Hills forests; and also Nairobi National Park. This is a very crutial water catchment for the people living downstream in Ukambani and coast region.
Bruce MacKenzie, Minister of Agriculture in Kenya, was killed when a time bomb attached to his plane exploded as it flew above Ngong Hills in a flight from Entebbe, Uganda on May 24, 1978, after Ugandan President Idi Amin ordered Ugandan agents to assassinate MacKenzie.
- Mol, Frans (1996) Maasai dictionary: language & culture (Maasai Centre Lemek). Narok: Mill Hill Missionary.
- Aeronautical chart for Nairobi area 1:1,000,000 scale
- McConnell, Tristan, "Kenya Reaps the Wind" August 5, 2009, World Environment News, Planet Ark 
- Ochami, David (12 September 2011). "Ugandan agents killed former Cabinet minister, says dossier". Standard Digital News. Retrieved 26 September 2013.
- Melman, Yossi. "A history of cooperation between Israel and Kenya". JPost. Retrieved 26 September 2013.
- Photo of Ngong Hills from game reserve: showing entire ridge, with Rift Valley behind [Kijabe.org].
- Photos of Ngong area and from top of Ngong Hills.[dead link]
- Photo of Ngong Hills from Blixen lawn: showing yard left of Karen Blixen house, with Ngong Hills behind [from AAA-Calif.com].[dead link]
- Photo of Ngong Hills from Great Rift Valley: showing severe drop, with Nairobi suburbs on opposite side [PBase.com].
- Photo of Ngong Hills from Great Rift Valley, closeup: showing vegetation, Nairobi suburbs on opposite side [PBase.com].
- Photo of Ngong Hills from Great Rift Valley, closeup: showing vegetation, suburbs [full webpage from PBase.com].