Sindh's largest district by area is Thatta and by population its one of the Karachi districts since combined population of six Karachi districts is over 13 million by 1998 census making average population of these six districts over 2 million each.
Sindh's largest district by area is Thatta and by population its Karachi West with a population of 3,914,757 by 2017 Census. The combined population of six districts of Karachi division is over 16 million by 2017 census making an average population of these six districts of Karachi division over 2.675 million each.