Periyakulam (Tamil: [peɾijagɯɭam]) is a major town and a municipality in Theni district, in the Madurai Region, South Indian state of Tamil Nadu.

[2] Periyakulam is a city situated on the palm fringed banks of the Varaganathi, a perennial river with the great wall of the Kodaikanal hills.

It is located at the foothills of the Western Ghats bordering the neighbouring state of Kerala.

It stands on the bank of the 'Varaha' (in Hindu mythology, Lord Maha Vishnu's Boar incarnation) river.

Periyakulam riverine wetland is situated in Udayar pallam, Kanyakumari District, Tamil Nadu.

[5] The villages that are included are Keelavadakarai, Kailasapatti, T. Kallipatti, Thamarai kulam, Vadugapatti, Melmangalam and Jeyamangalam villages that also stand on the banks of the Varaha River.

The original town was near New ground but later shifted due to plague scare.

[6] According to 2011 census, Periyakulam had a population of 42,976 with a sex-ratio of 1,013 females for every 1,000 males, much above the national average of 929.

[10] Periyakulam comes under Theni Lok Sabha Constituency and is now represented by Ravindhranath.

Periyakulam is an undesigned river-based settlement city which located "Theni district" in India.

The streets around the city are based upon communal settlements symbolizing the structure of the cosmos.

[2] It owns rich resources with bunch of historical relics such as "archaeological vestiges, inscriptions and ancient temples".

In 1942 an affluent business person Thiru K Chellam Iyer Properitor of Bavani Krishna Vilas Hotel - Periyakulam, dredged the entire falls area, closed the dangerous holes, constructed dressing rooms, in the falls and staircases for safe access to the falls.