Koothanallur (shortened as KNR) is a town in Tiruvarur district in the South Indian state of Tamil Nadu.

Koothanallur comes under the Thiruvarur assembly constituency which elects a member to the Tamil Nadu Legislative Assembly once every five years and it is a part of the Nagappattinam constituency which elects its Member of Parliament (MP) once in five years.

Roadways are the major mode of transportation to the town and the nearest railway station is at Mannargudi.

Like in the rest of the state, the period from November to February in Mannargudi has a climate full of warm days and cool nights.

[7] As per the religious census of 2011, Kuthanallur had 53.14% Muslims, 44.83% Hindus, 1.87% Christians, 0.01% Sikhs, 0.08% Jains and 0.06% following other religions.

[10] Most of the Knr'ians working in abroads like GCC countries, Malaysia, Singapore, Brunei etc.. Agriculture is the principal occupation of the people of Koothanallur.

[11] Kalaivanan][15] Koothanallur was a town Panchayat till 1994, when it was promoted to a grade III Municipality.

[17] The functions of the municipality is devolved into six departments: General, Engineering, Revenue, Public Health, Town planning and the Computer Wing.

[15] Koothanallur is a part of the Nagapattinam (Lok Sabha constituency) and it elects its member of parliament every five years.

[16] Late S. Murugaiyan was former chairman of Koothanallur and Mannargudi (Tiruvarur District) Municipality between 1973 and 1978.

[citation needed] A new building for the municipality was constructed near New Bus Stand and operations were shifted there.

[24] In 1932, Sanmargha Thondar Sabha was started in the town, that published Muslim books and ran an Islamic library.

[27] Water supply is provided by the municipality of Koothanallur from Vennar river through gravity transmission.

In the period 2010–2011, a total of 2.36 million litres of water was supplied every day for households in the town.

[28][29] About six metric tonnes of solid waste are collected from Koothanallur every day by door-to-door collection out of the six metric tonnes generated and subsequently the source segregation and dumping is carried out by the sanitary department of the municipality.

[31] The municipality maintains a total of 0.87 km (0.54 mi) of storm water drains in Koothanallur.

[37] The Tamil Nadu State Transport Corporation operates daily services connecting various cities to Koothanallur.

The State Express Transport Corporation operates long-distance buses connecting the town to cities like Chennai.