| Achanoor | |
| Settlement Type: | village |
| Pushpin Map: | India Tamil Nadu#India |
| Pushpin Label Position: | right |
| Pushpin Map Caption: | Location in Tamil Nadu, India |
| Coordinates: | 10.8803°N 79.0681°W |
| Subdivision Type: | Country |
| Subdivision Name: |  India |
| Subdivision Type1: | State |
| Subdivision Name1: | Tamil Nadu |
| Unit Pref: | Metric |
| Population Density Km2: | auto |
| Demographics Type1: | Languages |
| Demographics1 Title1: | Official |
| Demographics1 Info1: | Tamil |
| Timezone1: | IST |
| Utc Offset1: | +5:30 |
Achanoor is a village in Tamil Nadu, India, that lies between Thiruvaiyaru and Kallanai (Grand Anaicut). The main economic activity in the village is agriculture. It has fertile lands, due to its location in the Kaveri delta region. Rice, sugarcane, bananas, betel leaf, onions, and coconuts are the village's chief products. Neighboring villages include Marur, Sathanoor and Vaidhyanathanpettai. Achanoor is from Thiruvaiyaru and from Thanjavur. Nearly 75% of Achanoor's residents are Roman Catholic. Saint Anthony's Church plays an important role in the lives of the village's residents. Every May, the village celebrates Saint Anthony's Festival.