| Vanavanmahadevi | |
| Settlement Type: | village |
| Pushpin Label Position: | right |
| Pushpin Map Caption: | Location in Tamil Nadu, India |
| Subdivision Type: | Country |
| Subdivision Name: |  India |
| Subdivision Type1: | State |
| Subdivision Name1: | Tamil Nadu |
| Subdivision Type2: | District |
| Subdivision Name2: | Nagapattinam |
| Unit Pref: | Metric |
| Population Density Km2: | auto |
| Demographics Type1: | Languages |
| Demographics1 Title1: | Official |
| Demographics1 Info1: | Tamil |
| Timezone1: | IST |
| Utc Offset1: | +5:30 |
Vanavanmahadevi is a village in the Nagapattinam district of the Indian state of Tamil Nadu. It has a population of 5120 and the main activities are agriculture and fishing.
The name is derived from the name of King Raja Raja Chola I's mother. In her memory the renowned poet Kalamega Pulavar gave the name to this village.