Kiambu County has twelve constituencies; Gatundu South, Gatundu North, Juja, Thika Town, Ruiru, Githunguri, Kiambu, Kiambaa, Kabete, Kikuyu, Limuru, and Lari. Governor Kimani Wamatangi heads the county.
Below is a list of MPs in Kiambu County.
List Of MPs In Kiambu County
| Constituency | MP | Party |
| Gatundu South | Gabriel Gathuka Kagombe | UDA |
| Gatundu North | Elijah Njore Njoroge | Independent |
| Juja | George Koimburi Ndung’u | UDA |
| Thika Town | Alice Wambui Ng’ang’a | UDA |
| Ruiru | Simon Ng’ang’a Kingara | UDA |
| Githunguri | Gathoni Wamuchomba | UDA |
| Kiambu | John Machua Waithaka | UDA |
| Kiambaa | John Njuguna Wanjiku | UDA |
| Kabete | James Githua Kamau Wamacukuru | UDA |
| Kikuyu | Anthony Kimani Ichung’wah | UDA |
| Limuru | John Kiragu Chege | UDA |
| Lari | Joseph Mburu Kahangara | UDA |