| Pethampalayam | |
| Settlement Type: | Town |
| Pushpin Map: | India Tamil Nadu |
| Pushpin Map Caption: | Location in Tamil Nadu, India |
| Coordinates: | 11.3586°N 77.5678°W |
| Subdivision Type: | Country |
| Subdivision Name: |  India |
| Subdivision Type1: | State |
| Subdivision Name1: | Tamil Nadu |
| Subdivision Type2: | District |
| Subdivision Name2: | Erode |
| Unit Pref: | Metric |
| Population Total: | 7132 |
| Population As Of: | 2001 |
| Population Density Km2: | auto |
| Demographics Type1: | Languages |
| Demographics1 Title1: | Official |
| Demographics1 Info1: | Tamil |
| Timezone1: | IST |
| Utc Offset1: | +5:30 |
| Postal Code: | 638116 |
| Registration Plate: | TN 56 |
Pethampalayam, also known as Peddampalayam, is a panchayat town in Erode district in the Indian state of Tamil Nadu.
India census,[1] Pethampalayam had a population of 7,132. Males constitute 50% of the population and females 50%. Pethampalayam has an average literacy rate of 55%, lower than the national average of 59.5%: male literacy is 60%, and female literacy is 38%. In Pethampalayam, 9% of the population is under 6 years of age.