Kajiado District was an administrative district in the Rift Valley Province of Kenya.
It had a population of 406,054 and an area of 21,903 km².
[1] The district bordered Nairobi region and extended to the Kenya-Tanzania border further south.
The district is divided into seven administrative divisions.
The newly created Isinya division is not included in the following table based on 1999 census: There are three constituencies in the district: