Gatundu South is an electoral constituency in Kiambu County, Kenya and the seat of the District Officer in Gatundu Town. It is one of twelve constituencies in Kiambu County. The constituency has four wards, Kiamwangi, Kiganjo, Ndarugo, and Ng'enda, all of them are within the Kiambu County Council. The constituency was established before the 1997 General Elections. Previously it was part of the larger Gatundu Constituency which was split into Gatundu South Constituency and Gatundu North Constituency it is ranked 182 out of 210 Constituencies in Kenya in size and 165 out of 210 in population size.

Two of Kenya's Presidents are from Gatundu South Constituency: Mzee Jomo Kenyatta (Kenya's founding father and first President of The Republic of Kenya 1964–1978) and his son President Uhuru Kenyatta, 2013–Present.

The current Gatundu South MP is Gabriel (GG) Kagombe who succeeded Moses Kuria a student of Thika High School

Theta Dam

Theta Dam is in Gatundu South. It's located inside Kinale Forest, its being constructed across Theta River in Gatundu South constituency. The project includes construction of a 17-meter-high compacted earth fill dam, Construction of a reinforced concrete spillway and Laying of a 3.5 km long 500mm diameter steel pipeline up to the Mundoro forest edge.

On completion, Theta dam reservoir will have a storage capacity of 2 million cubic meters (2 Billion liters). This will enable production of 15,000 m3/day of water that will augment both the Ndarugu and Thiririka water projects reliability. This will improve water supply to the upper parts of Gatundu such as Gachika, Kiamuoria, Kiganjo, Gatitu of greater Kiganjo location and upper parts of greater Ndarugu locations.

Members of Parliament

Elections MP[1] Party Notes
1963 Jomo Kenyatta KANU Jomo Kenyatta also elected President of Kenya unopposed.
1974 Jomo Kenyatta KANU Jomo Kenyatta also elected President of Kenya unopposed.
1979 Ngengi wa Muigai KANU
1983 Ngengi Muigai KANU
1988 Zachary Kimemia Gakunju KANU
1992 Anthony Kamuiru Gitau Ford
1997 Moses Mwihia SDP Gatundu Constituency split into Gatundu North Constituency and Gatundu South Constituency.
2002 Uhuru Kenyatta KANU
2007 Uhuru Kenyatta KANU Uhuru Kenyatta also appointed to serve as the Deputy Prime Minister on the grand coalition government.
2013 Jossy Ngugi Nyumu TNA Uhuru Kenyatta also elected President of the Republic of Kenya on March 4, 2013, on a TNA Ticket. Josepgh Ngugi Nyumu died on 21 May 2014
2014 Kenyan by-election Moses Kuria TNA
2017 Moses Kuria JP
2022 Gabriel (GG) Kagombe UDA

Population Data


177 km2 (68 sq mi) (Ranked 182 of 210 Constituencies)


107,049 (Ranked 165 of 210 Constituencies)

Population Density

593.5/km2 (1,537/sq mi) (Ranked 40 of 210 Constituencies)





Gender Index (women to men)

1.08 (Ranked 53 of 210 Constituencies)



Average Household size

3.82 (Ranked 167 of 210 Constituencies)

Registered Voters


Proportion of Population Registered to Vote

0.48 (Ranked 19 of 210 Constituencies)

Proportion of Youth Voters

0.42 (Ranked 162 of 210 Constituencies)

Locations and wards

Location Population*
Kiamwangi 23,630
Kiganjo 28,502
Ndaragu 21,554
Ng'enda 46,562
Total x
1999 census.[2]
Ward Registered Voters
Kiamwangi 11,333
Kiganjo 12,698
Ndaragu 9,459
Ng'enda 23,154
Total 56,644
*September 2005.[3]