Before the 2013 elections, the constituency was broken into Juja, Ruiru and Thika Town constituencies. The current MP is Hon. George Koimburi who won a by-election in 2021.This followed the death of Hon. Francis Munyua Waititu of Jubilee Party who had been first elected in 2013 and re-elected in 2017. It has a population of 300,948 people (2019 census).[1]
It is home to the main campus of Jomo Kenyatta University of Agriculture and Technology (JKUAT).