Lang'ata Constituency is an electoral constituency in Nairobi City County. It is one of the seventeen constituencies in the county, consisting of southern and southwestern areas of Nairobi. Langata constituency had common boundaries with a now-defunct Kibera Division of Nairobi. It is the largest constituency in Nairobi with an area of 196.80 km2 (76.0 sq mi). It was known as Nairobi South Constituency at the 1963 elections but since the 1969 elections it has been known as Lang'ata Constituency.