Prakasam district is an administrative district in the Coastal Andhra region of the Indian state of Andhra Pradesh. The headquarters of the district are located at Ongole. It is located on the west coast of Bay of Bengal and is bounded by Guntur district on the north, Kurnool district on the west, Kadapa and Nellore districts on the south. A part of north west region also borders the Mahabubnagar district of Telangana.It is the 3rd largest district in the state with an area of 17,626 km2 (6,805 sq mi) and had a population of 3,392,764 as per 2011 census of India.

The district was named after the patriot Tanguturi Prakasam, also known as Andhra Kesari (Lion of Andhra), who was born in the village of Vinodarayunipalem. It was accordingly renamed as Prakasam District in the year 1972.

Prakasam district was originally constituted on 2 February 1970, carved out of Guntur, Nellore and Kurnool districts of Andhra Pradesh.It was carved out of four taluks of Guntur District, i.e. Addanki, Chirala, Darsi and Ongole, three taluks of Nellore district, i.e. Kandukur, Kanigiri, and Podili and three taluks of Kurnool district i.e. Markapur, Cumbum and Giddaluru. It is one of the nine districts in the Coastal Andhra region of Andhra Pradesh.Prakasam District is a part of the Red Corridor.

Prakasam district occupies an area of 17,626 square kilometres (6,805 sq mi),comparatively equivalent to Indonesia’s Seram Island.The only Municipal Corporation in Prakasam is Ongole. Some of the main towns in Prakasam district are Singarayakonda, Addanki, Inkollu, Markapur, Yerragondapalem, Podili, Darsi, Donakonda, Chirala, Kandukur, Pamuru, Parchur, Giddaluru, Dornala, Cumbum, Kanigiri, Chimakurthy and Martur. Markapur is India’s main slate manufacturing town where the historic temple of Lord Chennakesava is situated. Chimakurthi is world-renowned for its granite reserves. Dornala is also known as Diguva Srisailam, since it is very near the historic pilgrimage center of Srisailam.

At the 2011 census Prakasam District had a population of 3,392,764, roughly equal to the nation of Panama or the US state of Connecticut.It was the 98th most populous district in India (out of a total of 640).The district had a population density of 192 inhabitants per square kilometre (500/sq mi).Its population growth rate over the decade 2001–2011 was 10.9%.Prakasam had a sex ratio of 981 females for every 1000 males, and a literacy rate of 63.53%.Telugu is the language spoken here. Cumbum mandal showed a very good growth indicators in the 2011 census. According to census of India, Cumbum mandal has been recognized as the second highest in literacy in Praksam district literacy having 73.55% literates after Ongole Mandal. Also Cumbum mandal is the third highest in sex ratio in Prakasam district having 1031 female population per 1000 males.

The district is well connected by National highways, state highways and district roads as well. The NH 5 or NH 16 passes through Ongole which is the major highway connecting Howrah – Chennai, a part of Asian Highway Network. APSRTC, a state government public bus transport operates services connecting major cities and towns like Kandukur, Chirala, Markapur, Ongole and also to remote villages in the district.Railways in the district comes under South Central Railway zone and has good connectivity on Howrah-Chennai main line. Ongole is one of the main stations of this district and most of the stations are under Vijayawada Railway Division.Minister of State for Civil Aviation, has granted site clearance for setting up of a Greenfield Airport at Ongole.