| Kalasapakkam | |
| Other Name: | nallaoor |
| Settlement Type: | Town |
| Pushpin Map: | India Tamil Nadu#India3 |
| Pushpin Label Position: | left |
| Pushpin Map Caption: | Location in Tamil Nadu, India |
| Coordinates: | 12.4167°N 79.1°W |
| Subdivision Type: | Country |
| Subdivision Name: |  India |
| Subdivision Type1: | State |
| Subdivision Name1: | Tamil Nadu |
| Subdivision Type2: | District |
| Subdivision Name2: | Tiruvannamalai |
| Unit Pref: | Metric |
| Elevation M: | 181 |
| Population Total: | 47,271 |
| Population As Of: | 2011 |
| Population Density Km2: | auto |
| Demographics Type1: | Languages |
| Demographics1 Title1: | Official |
| Demographics1 Info1: | Tamil |
| Timezone1: | IST |
| Utc Offset1: | +5:30 |
| Postal Code Type: | PIN |
| Postal Code: | 606751 |
| Area Code Type: | Telephone code |
| Area Code: | 04181 |
| Registration Plate: | TN-25 |
| Blank1 Name Sec1: | Coastline |
| Blank1 Info Sec1: | 0km (00miles) |
| Blank2 Name Sec1: | Nearest city |
| Blank2 Info Sec1: | Thiruvannamlai, polur |
| Blank3 Name Sec1: | Lok Sabha constituency |
| Blank3 Info Sec1: | Thiruvannamlai |
| Blank4 Name Sec1: | Vidhan Sabha constituency |
| Blank4 Info Sec1: | kalasapakkam |
| Blank1 Name Sec2: | Avg. summer temperature |
| Blank1 Info Sec2: | 35°C |
| Blank2 Name Sec2: | Avg. winter temperature |
| Blank2 Info Sec2: | 19°C |
Kalasapakkam is a town on the river bed of Cheyyar River and the headquarters of Kalasapakkam taluk in Tiruvannamalai district, Tamil Nadu, India. It has a population of 47,210 according to 2011 census. It has an area of 532 km2. It is one of the oldest towns of North Arcot District. Now the town is replaced by large-scale industries.
It is located at 12.4167°N 79.1°W at an elevation of 181 m above MSL.[1]
Kalasapakkam taluk has 45 village Panchayats. The Details of 45 Village Panchayats in Kalasapakkam Panchayat Union. Venkatampalayam, Veeralur, Vanniyanur, Thenpallipattu, Thenmagadevamangalam, Siruvallur, Singaravadi, Cholavaram, Sengaputheri, Cheetambattu, Poondi, Pillur, Pattiyanthal, Pathiyavadi, Pazhankovil, Padakam, Mottur, Melvilvarayanallur, Melpalur, Melarani, Melchozhankuppam, Mattavettu, Ladavaram, Kovilmadhimangalam, Keezhpothirai, Kilpalur, Kilkuppam, Kitampalaiyam, Kettavarampalaiyam, Kappalur, Kanthapalaiyam, Kampattu, Kaalur, Kalasapakkam, Kadaladi, Gangavaram, Kenkalamakatevi, Ernamangalam, Elathur, Thevarayanpalaiyam, Arunagirimankalam, Aniyalai, Anaivadi, Alangaramangalam, Aadhamangalam.