Kiambu County has twelve (12) constituencies, which are Gatundu South, Gatundu North, Juja, Thika Town, Ruiru, Githunguri, Kiambu, Kiambaa, Kikuyu, Kabete, Limuru, and Lari. These constituencies are further divided into 60 electoral wards. Ruiru Constituency has the highest number of wards with 8 wards, while the rest of the constituencies have five each with the exemption of Kiambu, Gatundu South and Gatundu North which has four each.
Political Units
County Electoral Wards by Constituencies
| Constituency | Area(Km2) | No Of Wards | No Of Sub Locations |
|---|---|---|---|
| Gatundu South | 192.4 | 4 | 38 |
| Gatundu North | 286 | 4 | 28 |
| Juja | 326.6 | 5 | 7 |
| Thika Town | 217.5 | 5 | 12 |
| Ruiru | 201.4 | 8 | 9 |
| Githunguri | 173.5 | 5 | 20 |
| Kiambu | 105.9 | 4 | 18 |
| Kiambaa | 83.2 | 5 | 20 |
| Limuru | 281.7 | 5 | 16 |
| Kikuyu | 175.8 | 5 | 12 |
| Kabete | 60.3 | 5 | 13 |
| Lari | 439.2 | 5 | 40 |
| TOTAL | 2543.5 | 60 | 233 |
Eligible and Registered Voters by Constituency
The county has a total of 860,716 registered voters against an estimated number of 980,049 voters. Ruiru constituency has the highest number of registered voters while Gatundu North constituency has the lowest as at 18th December 2012.
| Constituency | Eligible Voters | Number of Registered Voters |
|---|---|---|
| Gatundu South | 64,192 | 58,183 |
| Gatundu North | 55,967 | 53,259 |
| Juja | 75,178 | 72,000 |
| Thika Town | 103,138 | 104,204 |
| Ruiru | 125,085 | 112,266 |
| Githunguri | 86,784 | 77,396 |
| Kiambu | 69,598 | 58,517 |
| Kiambaa | 88,741 | 70,087 |
| Kabete | 88,761 | 62,174 |
| Kikuyu | 80,736 | 65,235 |
| Limuru | 75,231 | 68,411 |
| Lari | 66,638 | 58,984 |
| TOTAL | 980,049 | 860,716 |