Thaba-Tseka is a district of Lesotho. Thaba-Tseka is also the name of the district's capital or camptown, which is the only town in the district. In the east, Thaba-Tseka borders on the KwaZulu-Natal Province of South Africa. Domestically, it borders on Mokhotlong District in northeast, Leribe District in north, Berea District in northwest, Maseru District in west, Mohale's Hoek District in southwest and Qacha's Nek District in the southern direction. The district is one of the major tourist attractions in Lesotho because of the second largest arch dam in Africa Katse Dam.
As of 2016, the district had a population of 135,347 which was 6.92 per cent of the total population of the country. The total area of the district was 4,270 which was 14.07 per cent of the total area of the country. The density of population in the district was 30.00 per sq. km. As of 2008, there were 38 per cent economically active people in the district. There were totally 77,836 employed people out of a total of 156,640 people in the district above 15 years of age.
As of 2006, the district had a population of 129,881, 6.92 per cent of the population of the country. The total area of the district was 4,270, 14.07 per cent of the country. The population density in the district was 30.00 persons per square kilometre, compared to the 62 for the country. There were five constituencies and thirteen community councils in the district. As of 2006, 295 people tested HIV positive, 18.20 per cent of the HIV-positive persons in the country. 116 of these (14.50%) were men; 179 (20.50%) were women.