Khammam is named after Narasimhadri, atempleon a hill in the city, it was later renamed as Stamba Sikhari, it was called Stambadri. Some places in Warangal and Nalgonda were merged to form Khammam district. It is believed that Lord Narasimha came out of a stone pillar and killed the evil king Hiranyakashyap to save the child-worshiping Prahlada. It is said that this incident was settled in Kali Yuga. The steep rock under the temple is known as Kamba and the city at the bottom of the hill is called Kambettu, which gradually turned into Khammam Matt and finally Khammam.
The important rivers flowing through the district are the Godavari, Sabari, Kinarasani, Munnaru, Paleru, Akaru and Vyra. The Munnaruriverthat rises in Warangal district flows into the south wards passing through Kothagudem and Khammam revenue divisions. The Akru river which rises in Warangal district also flows in the southeast direction. And Tardla meets the village of Munnaru. The city is situated on the banks of a river called Munnaru which is a tributary of theKrishnaRiver.
Many famous personalities of the district have been part of the freedom movement since ages. Some of them are - Jamalapuram Keshav Rao, Vattikonda Ramkotaya, Kurapati Venkata Raju, Hiralal Moriya, Gella Keshav Rao, Kollipaka Kishan Rao, Pulabhotta Venkateswarlu, Nedumuri Jagannath Rao, Pabbaraju Ranga Rao, Sarabdev and Saravanadevi is an oldfestivalwhich is known in the name of Khammam. "Stambhadri" is remembered.