Chidambaram is a historic town and municipality situated in the Cuddalore district of the Indian state of Tamil Nadu. Located on the banks of the Vellar River, where it meets the Bay of Bengal, the town boasts a rich antiquity, having been governed by various dynasties including the Pallavas, Cholas, Pandyas, Vijayanagara Empire, Nayakas, Marathas, and the British. The name 'Chidambaram' is believed to be derived from the Tamil words 'citt' (wisdom) and 'ampalam' (atmosphere), referring to the spiritual essence associated with the presiding deity. The town is particularly renowned for the Thillai Nataraja Temple, dedicated to Lord Shiva as Nataraja, the cosmic dancer, and is a significant center for arts and spiritual culture in South India [1].

Beyond its religious significance, Chidambaram serves as the headquarters of the Chidambaram taluk and covers an area of 25.5 km². The town's topography is largely plain, characterized by surrounding forests and alluvial and red soil types suitable for various crops. Its strategic location near the Bay of Bengal has contributed to its historical importance as a cultural and trade hub. The town's cultural fabric is deeply intertwined with its temples and the vibrant festivals celebrated throughout the year, attracting a large number of devotees and tourists [1].

• Chidambaram is administered by a Selective Grade Municipality, initially formed as a third-grade municipality in 1873, and upgraded to its current status in 1998 [1].
• As per the 2011 census, Chidambaram had a population of 62,153, with a sex ratio of 1,032 females per 1,000 males, exceeding the national average [1].
• The town's primary economic driver is tourism, centered around the Thillai Nataraja Temple, which attracts a significant floating population annually [1].
• Annamalai University, established in 1929 on the outskirts of Chidambaram, is one of Tamil Nadu's oldest and most prominent universities, contributing significantly to the local economy and educational landscape [1].
• Chidambaram is located at coordinates 11°24′25″N 79°41′28″E and is approximately 215 km from Chennai [1].
• The town experiences an average annual rainfall of 1,248 mm, with the bulk of precipitation occurring during the North East monsoon (October, November, and December) [1].
• The Chidambaram municipality efficiently manages solid waste, with an estimated 31 metric tonnes collected daily as of 2011 [1].

Chidambaram is governed by a Selective Grade Municipality, which was established as a third-grade municipality in 1873 and has undergone several upgrades, reaching its current status in 1998. The municipality encompasses an area of 11.16 km² and also functions as the taluk headquarters. It is divided into 33 wards, each represented by an elected councillor. The municipality's operations are managed through six specialized departments: general administration/personnel, Engineering, Revenue, Public Health, city planning, and Information Technology (IT) [1].

All municipal departments fall under the purview of a Municipal Commissioner, who serves as the executive head. Legislative authority rests with the 33-member body, headed by an elected chairperson and assisted by a deputy chairperson. For law and order, Chidambaram is under the jurisdiction of the Chidambaram sub-division of the Cuddalore district of the Tamil Nadu Police, led by a Deputy Superintendent. A single police station, located on West Car street, ensures public safety within the town [1].

Tourism stands as the foundational economic pillar of Chidambaram, largely driven by the spiritual significance of the Thillai Nataraja Temple. While household industries like weaving exist within the town limits, there are no major large-scale industrial units. As of 2001, the town's workforce comprised 18,249 individuals, accounting for 31.6% of the total population. A significant majority, 88% of the workforce, were engaged in the tertiary sector, which primarily includes tourism-related activities [1].

Seven percent of the workforce was involved in the secondary sector, encompassing household activities and cane furniture manufacturing, while the primary sector, involving local and regional marketing of agricultural products such as paddy, cereals, black gram, pulses, sugarcane, and gingelly, employed five percent. The town experiences a considerable influx of religious tourists, estimated at around 100,000 annually. Annamalai University, situated on the outskirts, also serves as a major economic catalyst, attracting students and faculty, and further cementing Chidambaram's role as a trading hub for surrounding rural areas, with numerous provisional stores, food grain outlets, vegetable shops, hotels, and markets [1].

Chidambaram boasts a well-developed road network, with the municipality maintaining 64.12 km of roads, comprising 8.44 km of concrete roads and 48.69 km of bituminous roads. National Highway 32 (Chennai-Villupuram-Puducherry-Cuddalore-Chidambaram-Nagapattinam-Thoothukudi Highway) and National Highway 81 (connecting Chidambaram with Coimbatore) pass through the town, ensuring good connectivity to major cities in Tamil Nadu. The town also has a main bus stand with 46 bays, facilitating daily services by the Tamil Nadu State Transport Corporation to various cities like Chennai, Madurai, and Bengaluru, along with long-distance routes operated by the State Express Transport Corporation [1].

Chidambaram is also connected by rail, with its railway station on the Mayiladuthurai-Viluppuram line, offering daily express trains to Chennai, Rameswaram, and other significant destinations. Local transportation is supported by private minibus services and auto-rickshaws. In terms of utility services, electricity is distributed by the Tamil Nadu Electricity Board (TNEB). Water supply is managed by the Chidambaram Municipality, drawing from mini power pumps, borewells, and deep borewells, supplying approximately 7.5 million liters of water daily in 2000–2001. While there is no underground drainage system, sewerage is managed through septic tanks, open drains, and public conveniences. Healthcare needs are met by the Kamaraj Government Hospital, a municipal maternity home, and 17 private hospitals and clinics. The municipality also maintains 1,856 street lamps and operates four markets to serve the town's needs [1].