| Karuthapillaiyur | |
| Native Name Lang: | Tamil |
| Settlement Type: | Village |
| Pushpin Map: | India Tamil Nadu#India |
| Pushpin Label Position: | right |
| Pushpin Map Caption: | Location in Tamil Nadu, India |
| Coordinates: | 8.7691°N 77.3651°W |
| Subdivision Type: | Country |
| Subdivision Name: |  India |
| Subdivision Type1: | State |
| Subdivision Name1: | Tamil Nadu |
| Subdivision Type2: | District |
| Subdivision Name2: | Tenkasi |
| Unit Pref: | Metric |
| Elevation M: | 90 |
| 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: | 627418 |
| Area Code Type: | Telephone code |
| Area Code: | (91)4634 |
| Registration Plate: | TN-76,TN-72 |
Karuthapillaiyur is a village in the district of Tenkasi near Ambasamudram, Tamil Nadu, India.
The name Karuthapillayur is an evolution from the mixing of three words "Karthar" "Pillai" "oor". "Karthar pillai oor" means village in Tamil. The name of the village roughly translated to 'a Black statue Lord Ganesh village'.
The village is located 30 km south of Tenkasi town. This village is surrounded by many villages and hamlets like Poovankurichi, Sivasailam, Mela Ambur, and Kalyanipuram. The spoken language in this area is Tamil. Karuthapillaiyur is located on the bank of Kadananathi River (Kadana Nadi). The area is surrounded by mountains and hills which are part of the Western Ghats. The village has many paddy fields, mango orchards, vegetable gardens, palm trees and tall coconut trees.
Bus and train are the major transport methods. The nearest railway station is in Kizha Ambur, 5 km from the village. Another railway station is in Alwarkurichi, 7.5 km from the village.