South Waziristan is the southern part of Waziristan, a mountainous region of northwest Pakistan, bordering Afghanistan.
The region was an independent tribal territory from 1893, remaining outside of British-ruled empire and Afghanistan. The region became part of Pakistan in 1947.
The total population of South Waziristan is 429,841 according to 1998 census.
In terms of area, South Waziristan is the largest agency in FATA, being 6,619 km². It has two headquarters: Tank is the winter headquarters of the Agency while Wana is its summer headquarters.
It is bound to the north by the North Waziristan Agency, to the north-east by Bannu and Lakki Marwat Districts, to the east by tribal areas adjoining the Tank and Dera Ismail Khan Districts, to the south by Zhob District of Balochistan Province and tribal areas adjoining Dera Ismail Khan District, and to the west by Afghanistan