Shenkottai/Sengottai ( செங்கோட்டை in Tamil), is a city and a Municipality in the Tirunelveli district, of Tamilnadu, India. River Chittar originating from the Western Ghats and flowing through the city center in the Easterly direction and the Western Ghats on the near East, are the major geographical features of this region. Spread over an area of 2.68 Sq. Kilometers with a population of over 26,838, the economy of the town revolves around the cultivation of rice. The name Sengottai means Red Fort in Tamil. There is fort like structure on the entrance of this town. Sengottai is also spells as Shencottah, Shenkottai, Chengottai, Chenkottai, Sengottai, Senkottai) is. Sengottai is roughly 5 Kilometers from the courtallam waterfall. The Harihara and Kuntaaru rivers flow through the Town. The nearest airport is Madurai Airport and Tuticorin Airport, and the nearest international airport is Trivandrum Airport. The Indian Service Pin code is 627809. The Telecom code is 04633.

Before state reorganization sengottai was a part of the Travancore Kingdom. In December 1851, the boundary between tirunelveli and Travancore on the sengottai side was clearly defined as proposed by General Cullen as early as 1846, and finally sanctioned by the Madras Government. sengottai Municipality was constituted in 1921. The States Reorganisation Act, 1956 came into effect from the 1st November 1956 and consequently the Tamil speaking area of sengottai taluk of Quilon district were added to Madras State. sengottai was revised from III grade to II grade as per G.O. No.85 dated 22.5.98.