Lang'ata Constituency is an electoral constituency in Nairobi County, Kenya. It consists of southern and southwestern areas of Nairobi. Langata constituency has common boundaries with Kibera Division of Nairobi. The entire constituency is located within Nairobi City Council area. The constituency has an area of 223 km². It was known as Nairobi South Constituency at the 1963 elections but since 1969 elections it has been known as Langata Constituency.
Kibera, Kenya's largest slum is located in Langata constituency, as are Karen and Langata, some of the most affluent suburbs in Nairobi.