Khammam District is a district in the eastern region of the Indian state of Telangana. The city of Khammam is the district headquarters.
Khammam town which was the seat of Taluk Administration was a part of the larger Warangal district, till 1 October 1953. Six taluks of the Warangal district viz., Khammam, Madhira, Yellandu, Paloncha, Kothagudem and Burgampadu were carved out as a new district with Khammam as headquarters. On 1 November 1956, Hyderabad state was dissolved, and Khammam district became part of Andhra Pradesh.
In 1959, Bhadrachalam revenue division consisting of Bhadrachalam and Nuguru Venkatapuram Taluks of East Godavari district, which were on the other side of the river Godavari were merged into Khammam on grounds of geographical contiguity and administrative viability. Aswaraopeta was also part of West Godavari District up to 1959. In 1973 a new taluk with Sathupalli as headquarters was carved out from Madhira and Kothagudem taluks. In the year 1976 three new taluks were formed viz., Tirumalayapalem, Aswaraopeta and Manuguru by bifurcating Khammam, Kothagudem and Burgampadu taluks respectively.
In the year 1985, following the introduction of the mandal system, the district has been divided into 46 mandals, under four Revenue Divisions - Khammam, Kothagudem, Paloncha and Bhadrachalam.
On 2 June 2014, Khammam together with nine other districts became the new state of Telangana, which was separated from Andhra Pradesh. On 11 July 2014, the Lok Sabha approved a bill transferring seven mandals of Khammam district (Kukunoor, Velairpadu, Bhurgampadu, Chintoor, Kunavaram, Vararamachandrapuram and Bhadrachalam) back to Andhra Pradesh, in order to facilitate the Polavaram Irrigation project.